Function make_space

native/thirdpart/flatbuffers/flatbuffers.h:994–998

  }

  inline uint8_t *make_space(size_t len) {
    size_t space = ensure_space(len);
    cur_ -= space;
    return cur_;
  }

  // Returns nullptr if using the DefaultAllocator.
  Allocator *get_custom_allocator() { return allocator_; }