code: @Override
  	public boolean isSupportedType(TransferData aTransferType) {
  		return super.isSupportedType(aTransferType)
  				|| FileTransfer.getInstance().isSupportedType(aTransferType);
  	}
docs: /*
  (non-Javadoc)
  
  @see
  org.eclipse.ui.navigator.CommonDropAdapterAssistant#isSupportedType(org
  .eclipse.swt.dnd.TransferData)