47         private T[] _buffer;  field in Google.Protobuf.Buffers.ArrayBufferWriter
58             _buffer = new T[0];  in ArrayBufferWriter()
81             _buffer = new T[initialCapacity];  in ArrayBufferWriter()
88         public ReadOnlyMemory<T> WrittenMemory => _buffer.AsMemory(0, _index);
93         public ReadOnlySpan<T> WrittenSpan => _buffer.AsSpan(0, _index);
103         public int Capacity => _buffer.Length;
108         public int FreeCapacity => _buffer.Length - _index;
118             Debug.Assert(_buffer.Length >= _index);  in Clear()
119             _buffer.AsSpan(0, _index).Clear();  in Clear()
140             if (_index > _buffer.Length - count)  in Advance()
165             Debug.Assert(_buffer.Length > _index);  in GetMemory()
166             return _buffer.AsMemory(_index);  in GetMemory()
188             Debug.Assert(_buffer.Length > _index);  in GetSpan()
189             return _buffer.AsSpan(_index);  in GetSpan()
204                 int growBy = Math.Max(sizeHint, _buffer.Length);  in CheckAndResizeBuffer()
206                 if (_buffer.Length == 0)  in CheckAndResizeBuffer()
217                 int newSize = checked(_buffer.Length + growBy);  in CheckAndResizeBuffer()
219                 Array.Resize(ref _buffer, newSize);  in CheckAndResizeBuffer()