class_docstr: Action wrapper.
  
  Different types of operations are loaded into this wrapper for the DAG, each
  operators can be loaded and run in different ways.
code: def type(self):
      return self._type
  
file_path: towhee/towhee/runtime/operator_manager/operator_action.py
imports: from towhee.runtime.constants import OPType
label_desc: Use image node_id 2 for calling the OperatorAction obj's underlying member method code with example usage: obj.type() and returns: self