InternIonSeries - Perl class to represent internal fragment ion series.
For the time being this class is simply inherited from IonSeries without adding any new method. It is just here to have a dedicated object for internal ions such that we can identify them by call the method isa.
Constructor. %h is a hash of attribute=>value pairs, $IonSeries is a InSilicoSpectro::InSilico::IonSeries object, from which the attributes are copied.
Jacques Colinge, Upper Austria University of Applied Science at Hagenberg