text: public NativeUnixIndexInput(NativeUnixIndexInput other) throws IOException{base(other.ToString());this.fis = null;channel = other.channel;this.bufferSize = other.bufferSize;buffer = ByteBuffer.allocateDirect(bufferSize);filePos = -bufferSize;bufferPos = bufferSize;isOpen = true;isClone = true;seek(other.FilePointer);}