code: def _dict_is_default(ht, name):
      value = getattr(ht, name)
      return getattr(
          ht.__class__, name
      ).default_value == Undefined and (
          value is None or len(value) == 0
      )
  
file_path: pythreejs/pythreejs/core/BufferGeometry.py
imports: from ipywidgets import register, widget_serialization
  from traitlets import validate, TraitError, Undefined
  from ipydatawidgets import NDArrayWidget, get_union_array
  from .Geometry import _make_key_filter
  from .BufferGeometry_autogen import BufferGeometry
label_desc: Use image node_id 1 for calling a global function with example usage: _dict_is_default(ht, name) and returns: unknown