@Override
      protected ByteArraySequence computeValue(@NotNull FileContent inputData) {
        @Nullable PsiJavaFileStub stub = index(inputData.getFile(), inputData.getContent());
        if (stub == null) return null;
        BufferExposingByteArrayOutputStream buffer = new BufferExposingByteArrayOutputStream();
        myStubTreeSerializer.serialize(stub, buffer);
        return buffer.toByteArraySequence();
      }
@Override
      protected ByteArraySequence computeValue(@NotNull FileContent inputData)