ClefInterface

class abjad.clef.interface.ClefInterface(_client, updateInterface)

Bases: abjad.core.observer._Observer, abjad.core.grobhandler._GrobHandler, abjad.core.backtracking._BacktrackingInterface

Handle LilyPond Clef grob. Observe score structure to find effective clef. Manage forced clef changes.

change
True when core attribute changes at client, otherwise False.
default
effective
Effective core attribute governing client.
forced
suppress

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