Function clear_buffer

native/thirdpart/flatbuffers/flatbuffers.h:953–956

  }

  void clear_buffer() {
    if (buf_) Deallocate(allocator_, buf_, reserved_);
    buf_ = nullptr;
  }

  // Relinquish the pointer to the caller.
  uint8_t *release_raw(size_t &allocated_bytes, size_t &offset) {