public void SpectrumSelect()
{
MzSpectrum <MzmlPeak> v2 = _mzSpectrumA;
ISpectrum <IPeak> v3 = v2;
v3.Take(4);
var v5 = v3.Select(b => b.X);
Assert.AreEqual(328.73795, v5.First());
var bn = v2[0];
var bsrg = _mzSpectrumA[0];
}