* @param clr ClassLoader resolver
* @return An insertion request object.
*/
private InsertRequest getInsertRequest(DatastoreClass table, Class cls, ClassLoaderResolver clr)
{
RequestIdentifier reqID = new RequestIdentifier(table, null, RequestIdentifier.Type.INSERT, cls.getName());
InsertRequest req = (InsertRequest) requestsByID.get(reqID);
if (req == null)
{
req = new InsertRequest(table, cls, clr);
requestsByID.put(reqID, req);