You can imitate this with layering, but it would be nice to have it as a property of something - maybe the beamed group?
!NoteWorthyComposerClip(2.0,Single)
|Note|Dur:8th|Pos:-3|Opts:Stem=Up,Beam=First|Visibility:Never
|Note|Dur:8th|Pos:-2|Opts:Stem=Up,Beam
|Note|Dur:8th|Pos:-1|Opts:Stem=Up,Beam
|Note|Dur:8th|Pos:0|Opts:Stem=Up,Beam=End
!NoteWorthyComposerClip-End
!NoteWorthyComposerClip(2.0,Single)
|Rest|Dur:8th|Opts:Stem=Up,VertOffset=-2
|Rest|Dur:4th,Dotted|Opts:Stem=Up|Visibility:Never
!NoteWorthyComposerClip-End