Notation for gradually increasing beam number within one group of notes (extended technique)?

Hey! I’m attaching a hand drawn example, because I don’t know what the technique is called. I’ve seen it in a number of scores, though I can’t recall where.

Does Dorico have a function for this?

Select all the notes, right-click->Beaming->Create Fanned Beam

Jesper

As @jesele showed: they are called fanned beams.

More info here

Fantastic, thanks!!