class_docstr: Operator wrapper for initialization.
class_docstr_tok: ["Operator","wrapper","for","initialization","."]
code: def preload_op(self):
      try:
          loader = OperatorLoader()
          self._op = loader.load_operator(
              self._name,
              self._init_args,
              self._init_kws,
              tag=self._tag,
              latest=self._latest,
          )
      except Exception as e:
          err = f"Loading operator with error:{e}"
          engine_log.error(err)
          raise RuntimeError(err) from e
  
imports: from typing import Any, Dict, Tuple, Callable, TypeVar
  from functools import partial
  from towhee.runtime.operator_manager import OperatorLoader, OperatorRegistry
  from towhee.utils.log import engine_log
label_desc: Use image node_id 10 for calling the _OperatorWrapper obj's underlying member method code with example usage: obj.preload_op() without return types