flatbuffers: DetachedBuffer cannot be rewrapped [C++, clang 6.0, OSX 10.11.6, master]

affected language: cpp compiler version: clang 6.0 operating system version: macOs 10.11.6 flatBuffers version: current

DetachedBuffer automatically manages the memory, which is good. However, it is kind of hard (rather impossible) to permanently release the memory from the DetachedBuffer. I would like a functionality to get the pointers _cur and the size _reserved out from the detached buffer such that I can rewrap this memory somewhere else (without having to use type from the library). I have given FlatBufferBuilder a proxy object which forwards to my special allocator.

Something along the line:

AllocatorProxyFlatBuffer allocator(mySpecialAllocator);
flatbuffers::FlatBufferBuilder builder(1024, &allocator);
....
auto detachedBuffer = builder.Release();

uint8_t data = detachedBuffer.data() // pointer to the start of the data.
std:size_t size = detachedBuffer.size() // size of the data.

std::pair<uint8_t*, std::size_t> memory = detachedBuffer.Release();
// now we are responsible to deallocate  `memory.first` with `memory.second` bytes.
// Obvisouly we gonna do this with our `mySpecialAllocator`... somewhen...