@classmethod
get_animation_objects(cls, object_attr_sets: 'dict[X3DObject, dict]', id): 

@classmethod
frame_diffs(cls, ref: 'X3DObject | X3DHTML.X3DElement', test: 'X3DObject | X3DHTML.X3DElement', *rest: 'X3DObject | X3DHTML.X3DElement'): 

@classmethod
from_frames(cls, frames: 'list[X3DObject | X3DHTML.X3DElement]', **opts):