code: def public(obj):
      if not isinstance(obj, type):
          return False
      baseclasses = [Operation]
      return any([issubclass(obj, bc) for bc in baseclasses])
  
imports: from ..core import Overlay
  from ..core.operation import Operation
  from ..core.options import Compositor
  from .element import *
label_desc: Use image node_id 1 for calling a global function with example usage: public(obj) and returns: any, False