code: function() {
  			if (this._aHierarchyPropertyNames) {
  				return this._aHierarchyPropertyNames;
  			}
  
  			this._aHierarchyPropertyNames = [];
  
  			for ( var sName in this._oRecursiveHierarchySet) {
  				this._aHierarchyPropertyNames.push(this._oRecursiveHierarchySet[sName].getNodeValueProperty().name);
  			}
  
  			return this._aHierarchyPropertyNames;
  		}
docs: Get the names of all properties with an associated hierarchy
  
  @returns {string[]} List of all property names
  @public
  @function
  @name sap.ui.model.analytics.odata4analytics.EntityType#getAllHierarchyPropertyNames