code: public IStatus handlePluginTransferDrop(
  			IStructuredSelection aDragSelection, Object aDropTarget) {
  
  		IContainer target = getActualTarget((IResource) aDropTarget);
  		IResource[] resources = getSelectedResources(aDragSelection);
  
  		MoveFilesAndFoldersOperation operation = new MoveFilesAndFoldersOperation(
  				getShell());
  		operation.copyResources(resources, target);
  
  		if (target != null && target.isAccessible()) {
  			try {
  				target.refreshLocal(IResource.DEPTH_ONE, null);
  			} catch (CoreException e) {
  			}
  		}
  		return Status.OK_STATUS;
  	}
docs: /*
  (non-Javadoc)
  
  @see
  org.eclipse.ui.navigator.CommonDropAdapterAssistant#handlePluginTransferDrop
  (org.eclipse.jface.viewers.IStructuredSelection, java.lang.Object)