DiagnosisDocument doc = context.getDiagnosisDocument();
DiagnosisTransferHandler handler = (DiagnosisTransferHandler) doc.getDiagnosisTable().getTransferHandler();
JComponent target = doc.getDiagnosisTable();
return handler.importData(target, support.getTransferable());
}
@Override
public boolean canImport(TransferSupport support) {
// drop position の選択をしないようにする