public void writeVirtualOffset(long virtualOffset) throws IOException {
		lb.put(0, virtualOffset);
		out.write(byteBuffer.array());
	}
public void writeVirtualOffset ( long virtualOffset ) throws IOException { lb . put ( 0 , virtualOffset ) ; out . write ( byteBuffer . array ( ) ) ; }
Write the given virtual offset to the index. This method is for internal use only.
@param virtualOffset virtual file pointer
@throws IOException