Calculate the [[SourceStaffEntry]]'s minimum NoteLength.
Similar to RemoveAllInstructionsOfType but faster, because it stops searching when the first instruction of the given type is found.
Similar to RemoveAllInstructionsOfType but faster, because it stops searching when the first instruction of the given type is found.
A [[SourceStaffEntry]] is a container spanning all the [[VoiceEntry]]s at one timestamp for one [[StaffLine]].