private OperationHandle EnumerateReferencingInstancesCore(string namespaceName, CimInstance sourceInstance, string associationClassName, string sourceRole, CimOperationOptions options, CimAsyncCallbacksReceiverBase asyncCallbacksReceiver) { OperationHandle operationHandle = null; SessionMethods.ReferenceInstances(this._handle, options.GetOperationFlags(), options.GetOperationOptionsHandle(), namespaceName, sourceInstance.InstanceHandle, associationClassName, sourceRole, options.GetKeysOnly(), options.GetOperationCallbacks(asyncCallbacksReceiver), out operationHandle); return operationHandle; }