diff --git a/src/observable/map/ApplyMap.ts b/src/observable/map/ApplyMap.ts
index 0fef91c9..f8d09914 100644
--- a/src/observable/map/ApplyMap.ts
+++ b/src/observable/map/ApplyMap.ts
@@ -14,9 +14,9 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {BaseObservableMap, BaseObservableMapConfig} from "./BaseObservableMap";
+import {BaseObservableMap} from "./BaseObservableMap";
 import {SubscriptionHandle} from "../BaseObservable";
-import {config, Mapper, Updater, Comparator, Filter} from "./config";
+import {BaseObservableMapDefaults, Mapper, Updater, Comparator, Filter} from "./BaseObservableMapDefaults";
 import {JoinedMap} from "./JoinedMap";
 import {MappedMap} from "./MappedMap";
 import {FilteredMap} from "./FilteredMap";
@@ -24,16 +24,16 @@ import {SortedMapList} from "../list/SortedMapList.js";
 
 
 export class ApplyMap<K, V> extends BaseObservableMap<K, V> {
+    private _defaults = new BaseObservableMapDefaults<K, V>();
     private _source: BaseObservableMap<K, V>;
     private _subscription?: SubscriptionHandle;
     private _apply?: Apply<K, V>;
-    private _config: BaseObservableMapConfig<K, V>;
+
 
     constructor(source: BaseObservableMap<K, V>, apply?: Apply<K, V>) {
         super();
         this._source = source;
         this._apply = apply;
-        this._config = config<K, V>();
     }
 
     hasApply(): boolean {
@@ -105,19 +105,19 @@ export class ApplyMap<K, V> extends BaseObservableMap<K, V> {
     }
 
     join(...otherMaps: Array<typeof this>): JoinedMap<K, V> {
-        return this._config.join(this, ...otherMaps);
+        return this._defaults.join(this, ...otherMaps);
     }
 
     mapValues(mapper: Mapper<V>, updater?: Updater<V>): MappedMap<K, V> {
-        return this._config.mapValues(this, mapper, updater);
+        return this._defaults.mapValues(this, mapper, updater);
     }
 
     sortValues(comparator: Comparator<V>): SortedMapList {
-        return this._config.sortValues(this, comparator);
+        return this._defaults.sortValues(this, comparator);
     }
 
     filterValues(filter: Filter<K, V>): FilteredMap<K, V> {
-        return this._config.filterValues(this, filter);
+        return this._defaults.filterValues(this, filter);
     }
 
 }
diff --git a/src/observable/map/BaseObservableMap.ts b/src/observable/map/BaseObservableMap.ts
index 98781955..02dedce5 100644
--- a/src/observable/map/BaseObservableMap.ts
+++ b/src/observable/map/BaseObservableMap.ts
@@ -19,7 +19,7 @@ import {JoinedMap} from "../map/JoinedMap";
 import {MappedMap} from "../map/MappedMap";
 import {FilteredMap} from "../map/FilteredMap";
 import {SortedMapList} from "../list/SortedMapList.js";
-import {Mapper, Updater, Comparator, Filter} from "./config";
+import {Mapper, Updater, Comparator, Filter} from "./BaseObservableMapDefaults";
 
 export interface IMapObserver<K, V> {
     onReset(): void;
@@ -28,13 +28,6 @@ export interface IMapObserver<K, V> {
     onRemove(key: K, value: V): void
 }
 
-export type BaseObservableMapConfig<K, V> = {
-    join(_this: BaseObservableMap<K, V>, ...otherMaps: Array<BaseObservableMap<K, V>>): JoinedMap<K, V>;
-    mapValues(_this: BaseObservableMap<K, V>, mapper: any, updater?: Updater<V>): MappedMap<K, V>;
-    sortValues(_this: BaseObservableMap<K, V>, comparator: Comparator<V>): SortedMapList;
-    filterValues(_this: BaseObservableMap<K, V>, filter: Filter<K, V>): FilteredMap<K, V>;
-}
-
 export abstract class BaseObservableMap<K, V> extends BaseObservable<IMapObserver<K, V>> {
     emitReset(): void {
         for(let h of this._handlers) {
@@ -62,10 +55,11 @@ export abstract class BaseObservableMap<K, V> extends BaseObservable<IMapObserve
     }
 
     // The following group of functions have a default implementation
-    // in the neighboring `config.ts`. See the comment in that file for
-    // the explanation for why the default implementation isn't defined
-    // here. See the neighboring `ObservableMap.ts` for an example of how
-    // to easily use the default implementation in a class that extends
+    // in the neighboring `BaseObservableMapDefaults.ts`. See the comment
+    // in that file for the explanation for why the default implementation
+    // isn't defined here. See the neighboring `ObservableMap.ts` for an
+    // example of how to easily add the boilerplate for using the default
+    // implementations of these functions in a class that extends
     // this one (which is most likely what you want to do).
     abstract join(...otherMaps: Array<typeof this>): JoinedMap<K, V>;
     abstract mapValues(mapper: Mapper<V>, updater?: Updater<V>): MappedMap<K, V>;
diff --git a/src/observable/map/BaseObservableMapDefaults.ts b/src/observable/map/BaseObservableMapDefaults.ts
new file mode 100644
index 00000000..46d9148e
--- /dev/null
+++ b/src/observable/map/BaseObservableMapDefaults.ts
@@ -0,0 +1,55 @@
+/*
+Copyright 2022 Isaiah Becker-Mayer <ibeckermayer@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+import {BaseObservableMap} from "./BaseObservableMap";
+import {FilteredMap} from "./FilteredMap";
+import {MappedMap} from "./MappedMap";
+import {JoinedMap} from "./JoinedMap";
+import {SortedMapList} from "../list/SortedMapList.js";
+
+
+// This class is used as a default implementation of
+// the respective abstract functions in BaseObservableMap.
+// It is kept as its own class in its own file in order to avoid a circular
+// dependency between the classes that extend BaseObservableMap which are
+// instantiated here (i.e. `new JoinedMap()`).
+export class BaseObservableMapDefaults<K, V> {
+    join(_this: BaseObservableMap<K, V>, ...otherMaps: Array<BaseObservableMap<K, V>>): JoinedMap<K, V> {
+       return new JoinedMap([_this].concat(otherMaps));
+    }
+
+    mapValues(_this: BaseObservableMap<K, V>, mapper: Mapper<V>, updater?: Updater<V>): MappedMap<K, V> {
+        return new MappedMap(_this, mapper, updater);
+    }
+
+    sortValues(_this: BaseObservableMap<K, V>, comparator: Comparator<V>): SortedMapList {
+        return new SortedMapList(_this, comparator);
+    }
+
+    filterValues(_this: BaseObservableMap<K, V>, filter: Filter<K, V>): FilteredMap<K, V> {
+        return new FilteredMap(_this, filter);
+    }
+}
+
+export type Mapper<V> = (
+    value: V,
+    emitSpontaneousUpdate: any,
+) => V;
+
+export type Updater<V> = (params: any, mappedValue?: V, value?: V) => void;
+
+export type Comparator<V> = (a: V, b: V) => number;
+
+export type Filter<K, V> = (v: V, k: K) => boolean;
\ No newline at end of file
diff --git a/src/observable/map/FilteredMap.ts b/src/observable/map/FilteredMap.ts
index 00006a6d..b0ed2e82 100644
--- a/src/observable/map/FilteredMap.ts
+++ b/src/observable/map/FilteredMap.ts
@@ -14,16 +14,16 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {BaseObservableMap, BaseObservableMapConfig} from "./BaseObservableMap";
+import {BaseObservableMap} from "./BaseObservableMap";
 import {SubscriptionHandle} from "../BaseObservable";
-import {config, Mapper, Updater, Comparator, Filter} from "./config";
+import {BaseObservableMapDefaults, Mapper, Updater, Comparator, Filter} from "./BaseObservableMapDefaults";
 import {JoinedMap} from "./JoinedMap";
 import {MappedMap} from "./MappedMap";
 import {SortedMapList} from "../list/SortedMapList.js";
 
 export class FilteredMap<K, V> extends BaseObservableMap<K, V> {
+    private _defaults = new BaseObservableMapDefaults<K, V>();
     private _source: BaseObservableMap<K, V>;
-    private _config: BaseObservableMapConfig<K, V>;
     private _filter: Filter<K, V>;
     private _included?: Map<K, boolean>;
     private _subscription?: SubscriptionHandle;
@@ -32,7 +32,6 @@ export class FilteredMap<K, V> extends BaseObservableMap<K, V> {
         super();
         this._source = source;
         this._filter = filter;
-        this._config = config<K, V>();
     }
 
     setFilter(filter: Filter<K, V>): void {
@@ -165,19 +164,19 @@ export class FilteredMap<K, V> extends BaseObservableMap<K, V> {
     }
 
     join(...otherMaps: Array<typeof this>): JoinedMap<K, V> {
-        return this._config.join(this, ...otherMaps);
+        return this._defaults.join(this, ...otherMaps);
     }
 
     mapValues(mapper: Mapper<V>, updater?: Updater<V>): MappedMap<K, V>{
-        return this._config.mapValues(this, mapper, updater);
+        return this._defaults.mapValues(this, mapper, updater);
     }
 
     sortValues(comparator: Comparator<V>): SortedMapList {
-        return this._config.sortValues(this, comparator);
+        return this._defaults.sortValues(this, comparator);
     }
 
     filterValues(filter: Filter<K, V>): FilteredMap<K, V> {
-        return this._config.filterValues(this, filter);
+        return this._defaults.filterValues(this, filter);
     }
 }
 
diff --git a/src/observable/map/JoinedMap.ts b/src/observable/map/JoinedMap.ts
index bf9f8b97..d4164f79 100644
--- a/src/observable/map/JoinedMap.ts
+++ b/src/observable/map/JoinedMap.ts
@@ -14,8 +14,8 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {BaseObservableMap, BaseObservableMapConfig} from "./BaseObservableMap";
-import {config, Mapper, Updater, Comparator, Filter} from "./config";
+import {BaseObservableMap} from "./BaseObservableMap";
+import {BaseObservableMapDefaults, Mapper, Updater, Comparator, Filter} from "./BaseObservableMapDefaults";
 import {FilteredMap} from "./FilteredMap";
 import {MappedMap} from "./MappedMap";
 import {SortedMapList} from "../list/SortedMapList.js";
@@ -23,14 +23,13 @@ import {SubscriptionHandle} from "../BaseObservable";
 
 
 export class JoinedMap<K, V> extends BaseObservableMap<K, V> {
+    private _defaults = new BaseObservableMapDefaults<K, V>();
     protected _sources: BaseObservableMap<K, V>[];
-    private _config: BaseObservableMapConfig<K, V>;
     private _subscriptions?: SourceSubscriptionHandler<K, V>[];
 
     constructor(sources: BaseObservableMap<K, V>[]) {
         super();
         this._sources = sources;
-        this._config = config<K, V>();
     }
 
     onAdd(source: BaseObservableMap<K, V>, key: K, value: V): void {
@@ -136,19 +135,19 @@ export class JoinedMap<K, V> extends BaseObservableMap<K, V> {
     }
 
     join(...otherMaps: Array<typeof this>): JoinedMap<K, V> {
-        return this._config.join(this, ...otherMaps);
+        return this._defaults.join(this, ...otherMaps);
     }
 
     mapValues(mapper: Mapper<V>, updater?: Updater<V>): MappedMap<K, V> {
-        return this._config.mapValues(this, mapper, updater);
+        return this._defaults.mapValues(this, mapper, updater);
     }
 
     sortValues(comparator: Comparator<V>): SortedMapList {
-        return this._config.sortValues(this, comparator);
+        return this._defaults.sortValues(this, comparator);
     }
 
     filterValues(filter: Filter<K, V>): FilteredMap<K, V> {
-        return this._config.filterValues(this, filter);
+        return this._defaults.filterValues(this, filter);
     }
 
 }
diff --git a/src/observable/map/LogMap.ts b/src/observable/map/LogMap.ts
index 70fe623a..7b857678 100644
--- a/src/observable/map/LogMap.ts
+++ b/src/observable/map/LogMap.ts
@@ -14,8 +14,8 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {BaseObservableMap, BaseObservableMapConfig} from "./BaseObservableMap";
-import {config, Mapper, Updater, Comparator, Filter} from "./config";
+import {BaseObservableMap} from "./BaseObservableMap";
+import {BaseObservableMapDefaults, Mapper, Updater, Comparator, Filter} from "./BaseObservableMapDefaults";
 import {FilteredMap} from "./FilteredMap";
 import {MappedMap} from "./MappedMap";
 import {JoinedMap} from "./JoinedMap";
@@ -25,17 +25,15 @@ import {ILogItem, LabelOrValues} from "../../logging/types";
 import {LogLevel} from "../../logging/LogFilter";
 
 export class LogMap<K, V> extends BaseObservableMap<K, V> {
+    private _defaults = new BaseObservableMapDefaults<K, V>();
     private _source: BaseObservableMap<K, V>;
     private _subscription?: SubscriptionHandle;
     private _log: ILogItem;
-    private _config: BaseObservableMapConfig<K, V>
-
 
     constructor(source: BaseObservableMap<K, V>, log: ILogItem) {
         super();
         this._source = source;
         this._log = log;
-        this._config = config<K, V>();
     }
 
     private log(labelOrValues: LabelOrValues, logLevel?: LogLevel): ILogItem {
@@ -88,19 +86,19 @@ export class LogMap<K, V> extends BaseObservableMap<K, V> {
     }
 
     join(...otherMaps: Array<typeof this>): JoinedMap<K, V> {
-        return this._config.join(this, ...otherMaps);
+        return this._defaults.join(this, ...otherMaps);
     }
 
     mapValues(mapper: Mapper<V>, updater?: Updater<V>): MappedMap<K, V> {
-        return this._config.mapValues(this, mapper, updater);
+        return this._defaults.mapValues(this, mapper, updater);
     }
 
     sortValues(comparator: Comparator<V>): SortedMapList {
-        return this._config.sortValues(this, comparator);
+        return this._defaults.sortValues(this, comparator);
     }
 
     filterValues(filter: Filter<K, V>): FilteredMap<K, V> {
-        return this._config.filterValues(this, filter);
+        return this._defaults.filterValues(this, filter);
     }
 
 }
diff --git a/src/observable/map/MappedMap.ts b/src/observable/map/MappedMap.ts
index 95f49c2b..3d9e3a3c 100644
--- a/src/observable/map/MappedMap.ts
+++ b/src/observable/map/MappedMap.ts
@@ -14,8 +14,8 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {BaseObservableMap, BaseObservableMapConfig} from "./BaseObservableMap";
-import {config, Mapper, Updater, Comparator, Filter} from "./config";
+import {BaseObservableMap} from "./BaseObservableMap";
+import {BaseObservableMapDefaults, Mapper, Updater, Comparator, Filter} from "./BaseObservableMapDefaults";
 import {JoinedMap} from "./JoinedMap";
 import {FilteredMap} from "./FilteredMap";
 import {SortedMapList} from "../list/SortedMapList.js";
@@ -26,12 +26,13 @@ so a mapped value can emit updates on it's own with this._emitSpontaneousUpdate
 how should the mapped value be notified of an update though? and can it then decide to not propagate the update?
 */
 export class MappedMap<K, V> extends BaseObservableMap<K, V> {
+    private _defaults = new BaseObservableMapDefaults<K, V>();
     private _source: BaseObservableMap<K, V>;
     private _mapper: Mapper<V>;
     private _updater?: Updater<V>;
     private _mappedValues: Map<K, V>;
     private _subscription?: SubscriptionHandle;
-    private _config: BaseObservableMapConfig<K, V>
+
 
     constructor(
         source: BaseObservableMap<K, V>,
@@ -43,7 +44,6 @@ export class MappedMap<K, V> extends BaseObservableMap<K, V> {
         this._mapper = mapper;
         this._updater = updater;
         this._mappedValues = new Map<K, V>();
-        this._config = config<K, V>();
     }
 
     _emitSpontaneousUpdate(key: K, params: any): void {
@@ -115,18 +115,18 @@ export class MappedMap<K, V> extends BaseObservableMap<K, V> {
     }
 
     join(...otherMaps: Array<typeof this>): JoinedMap<K, V> {
-        return this._config.join(this, ...otherMaps);
+        return this._defaults.join(this, ...otherMaps);
     }
 
     mapValues(mapper: Mapper<V>, updater?: Updater<V>): MappedMap<K, V>{
-        return this._config.mapValues(this, mapper, updater);
+        return this._defaults.mapValues(this, mapper, updater);
     }
 
     sortValues(comparator: Comparator<V>): SortedMapList {
-        return this._config.sortValues(this, comparator);
+        return this._defaults.sortValues(this, comparator);
     }
 
     filterValues(filter: Filter<K, V>): FilteredMap<K, V> {
-        return this._config.filterValues(this, filter);
+        return this._defaults.filterValues(this, filter);
     }
 }
\ No newline at end of file
diff --git a/src/observable/map/ObservableMap.ts b/src/observable/map/ObservableMap.ts
index 950fb818..4b98c089 100644
--- a/src/observable/map/ObservableMap.ts
+++ b/src/observable/map/ObservableMap.ts
@@ -14,8 +14,8 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {BaseObservableMap, BaseObservableMapConfig} from "./BaseObservableMap";
-import {config, Mapper, Updater, Comparator, Filter} from "./config";
+import {BaseObservableMap} from "./BaseObservableMap";
+import {BaseObservableMapDefaults, Mapper, Updater, Comparator, Filter} from "./BaseObservableMapDefaults";
 import {JoinedMap} from "./JoinedMap";
 import {MappedMap} from "./MappedMap";
 import {FilteredMap} from "./FilteredMap";
@@ -23,12 +23,11 @@ import {SortedMapList} from "../list/SortedMapList.js";
 
 
 export class ObservableMap<K, V> extends BaseObservableMap<K, V> {
-    private _config: BaseObservableMapConfig<K, V>
+    private _defaults = new BaseObservableMapDefaults<K, V>();
     private readonly _values: Map<K, V>;
 
     constructor(initialValues?: (readonly [K, V])[]) {
         super();
-        this._config = config<K, V>();
         this._values = new Map(initialValues);
     }
 
@@ -101,19 +100,19 @@ export class ObservableMap<K, V> extends BaseObservableMap<K, V> {
     }
 
     join(...otherMaps: Array<typeof this>): JoinedMap<K, V> {
-        return this._config.join(this, ...otherMaps);
+        return this._defaults.join(this, ...otherMaps);
     }
 
     mapValues(mapper: Mapper<V>, updater?: Updater<V>): MappedMap<K, V> {
-        return this._config.mapValues(this, mapper, updater);
+        return this._defaults.mapValues(this, mapper, updater);
     }
 
     sortValues(comparator: Comparator<V>): SortedMapList {
-        return this._config.sortValues(this, comparator);
+        return this._defaults.sortValues(this, comparator);
     }
 
     filterValues(filter: Filter<K, V>): FilteredMap<K, V> {
-        return this._config.filterValues(this, filter);
+        return this._defaults.filterValues(this, filter);
     }
 };
 
diff --git a/src/observable/map/config.ts b/src/observable/map/config.ts
deleted file mode 100644
index fab0bcf8..00000000
--- a/src/observable/map/config.ts
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
-Copyright 2022 Isaiah Becker-Mayer <ibeckermayer@gmail.com>
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-import {BaseObservableMap, BaseObservableMapConfig} from "./BaseObservableMap";
-import {FilteredMap} from "./FilteredMap";
-import {MappedMap} from "./MappedMap";
-import {JoinedMap} from "./JoinedMap";
-import {SortedMapList} from "../list/SortedMapList.js";
-
-
-// This function is used as a default implementation of
-// the respective abstract functions in BaseObservableMap.
-// We implement it this way in order to avoid a circular
-// dependency between the classes that are instantiated here
-// (i.e. `new JoinedMap()`) and BaseObservableMap (as they extend it).
-export function config<K, V>(): BaseObservableMapConfig<K, V> {
-    return {
-        join: (_this: BaseObservableMap<K, V>, ...otherMaps: Array<BaseObservableMap<K, V>>): JoinedMap<K, V> => {
-            return new JoinedMap([_this].concat(otherMaps));
-        },
-        mapValues: (_this: BaseObservableMap<K, V>, mapper: Mapper<V>, updater?: Updater<V>): MappedMap<K, V> => {
-            return new MappedMap(_this, mapper, updater);
-        },
-        sortValues: (_this: BaseObservableMap<K, V>, comparator: Comparator<V>): SortedMapList => {
-            return new SortedMapList(_this, comparator);
-        },
-        filterValues: (_this: BaseObservableMap<K, V>, filter: Filter<K, V>): FilteredMap<K, V> => {
-            return new FilteredMap(_this, filter);
-        }
-    };
-}
-
-export type Mapper<V> = (
-    value: V,
-    emitSpontaneousUpdate: any,
-) => V;
-
-export type Updater<V> = (params: any, mappedValue?: V, value?: V) => void;
-
-export type Comparator<V> = (a: V, b: V) => number;
-
-export type Filter<K, V> = (v: V, k: K) => boolean;
\ No newline at end of file