private void InitSpectrumReader(MsDataFileImpl dataFile) { // Create the spectra object responsible for delivering spectra for extraction _spectra = new Spectra(_document, _filter, _allChromData, dataFile); // Determine what type of demultiplexer, if any, to use based on settings in the // IsolationScheme menu _demultiplexer = _spectra.CreateDemultiplexer(); if (_demultiplexer == null) { _spectra.RunAsync(); } }