code: def is_empty(self) -> bool:
      return len(self._values) == 0
  
imports: from abc import ABC
  from typing import Dict, Optional
  import numpy
  from .None import Indicator
  from ...util.values import to_numpy
label_desc: Use image node_id 5 for calling the _Collection obj's underlying member method code with example usage: obj.is_empty() and returns: unknown