 		}
 
 		/**
-		 * delayColumnRequest
 		 * This will put an initialized proxy column into the list of pending requests.
 		 * It will also call initializeHierarchySubtree() for a subtree of the hierarchy, if a subtree is missing.
 		 * This function can be overridden to have different behavior, but this definition is recommended.

		}
		
		/**
		 * requestHierarchyFromSource
		 * This function must be implemented by classes by extend AbstractDataSource.
		 * This function should make a request to the source to fill in the hierarchy at the given subtree.
		 * This function will only be called once per subtreeNode.

		}

		/**
		 * This function will call requestColumnFromSource() if the hierarchyPointer in the column is now valid.
		 * Otherwise, it will call delayColumnRequest() again.
		 * This function may be overridden by classes that extend AbstractDataSource.
