@Override
  public void serialize(final @NotNull PsiImportStatementStub stub, final @NotNull StubOutputStream dataStream) throws IOException {
    dataStream.writeByte(((PsiImportStatementStubImpl)stub).getFlags());
    dataStream.writeName(stub.getImportReferenceText());
  }
@Override
  public void serialize(final @NotNull PsiImportStatementStub stub, final @NotNull StubOutputStream dataStream)