[API] Clean up Composition API

src/MCT.js

@@ -49,6 +49,21 @@ define([
          */
         this.conductor = new TimeConductor();
 
+        /**
+         * An interface for interacting with the composition of domain objects.
+         * The composition of a domain object is the list of other domain
+         * objects it "contains" (for instance, that should be displayed
+         * beneath it in the tree.)
+         *
+         * `composition` may be called as a function, in which case it acts
+         * as [`composition.get`]{@link module:openmct.CompositionAPI#get}.
+         *
+         * @type {module:openmct.CompositionAPI}
+         * @memberof module:openmct.MCT#
+         * @name composition
+         */
+        this.composition = api.Composition;
+
         this.TimeConductor = this.conductor; // compatibility for prototype
         this.on('navigation', this.selection.clear.bind(this.selection));
     }
@@ -66,7 +81,7 @@ define([
      *
      * @type {module:openmct.ObjectAPI}
      * @memberof module:openmct.MCT#
-     * @name Objects
+     * @name objects
      */
     MCT.Objects = api.Objects;
 
@@ -76,7 +91,7 @@ define([
      *
      * @type {module:openmct.TelemetryAPI}
      * @memberof module:openmct.MCT#
-     * @name Telemetry
+     * @name telemetry
      */
 
     MCT.prototype.legacyExtension = function (category, extension) {

src/api/composition/CompositionAPI.js

@@ -19,13 +19,14 @@ define([
     };
 
     /**
-     * Retrieve the composition (if any) of this domain object. The
-     * composition of a domain object is the list of other domain objects
+     * An interface for interacting with the composition of domain objects.
+     * The composition of a domain object is the list of other domain objects
      * it "contains" (for instance, that should be displayed beneath it
      * in the tree.)
-     * @method Composition
+     *
+     * @interface CompositionAPI
      * @returns {module:openmct.CompositionCollection}
-     * @memberof module:openmct.MCT#
+     * @memberof module:openmct
      */
     function composition(object) {
         var provider = getProvider(object);
@@ -35,8 +36,28 @@ define([
         }
 
         return new CompositionCollection(object, provider);
-    };
+    }
 
+    /**
+     * Retrieve the composition (if any) of this domain object.
+     *
+     * @method get
+     * @returns {module:openmct.CompositionCollection}
+     * @memberof module:openmct.CompositionAPI#
+     */
+    composition.get = composition;
+
+    /**
+     * Add a composition provider.
+     *
+     * Plugins can add new composition providers to change the loading
+     * behavior for certain domain objects.
+     *
+     * @method addProvider
+     * @param {module:openmct.CompositionProvider} provider the provider to add
+     * @returns {module:openmct.CompositionCollection}
+     * @memberof module:openmct.CompositionAPI#
+     */
     composition.addProvider = function (provider) {
         PROVIDER_REGISTRY.unshift(provider);
     };