protected internal override byte _GetByte(int index) => HeapByteBufferUtil.GetByte(this.array, index);
protected internal override byte _GetByte(int index) => HeapByteBufferUtil.GetByte(this.Memory, this.Idx(index));
protected internal sealed override byte _GetByte(int index) => HeapByteBufferUtil.GetByte(Memory, Idx(index));