Function _arrow_supported_memory_backends

r/src/arrowExports.cpp:4023–4027

// memorypool.cpp
std::vector<std::string> supported_memory_backends();
extern "C" SEXP _arrow_supported_memory_backends(){
BEGIN_CPP11
	return cpp11::as_sexp(supported_memory_backends());
END_CPP11
}
// message.cpp
r_vec_size ipc___Message__body_length(const std::unique_ptr<arrow::ipc::Message>& message);
extern "C" SEXP _arrow_ipc___Message__body_length(SEXP message_sexp){