docstr: if the object named `name` exists
  
  Parameters
  ----------
  name : str
      name of the objecT
  
  Returns
  -------
  bool:
      If the object exists
docstr_tok: ["if","the","object","named","`","name","`","exists","Parameters","--","--","--","--","--","name",":","str","name","of","the","objecT","Returns","--","--","--","-","bool",":","If","the","object","exists"]
code: def exists(self, name: str) -> bool:
      """
      if the object named `name` exists
  
      Parameters
      ----------
      name : str
          name of the objecT
  
      Returns
      -------
      bool:
          If the object exists
      """
      raise NotImplementedError(f"Please implement the `exists` method")
  
imports: import os
  import pickle
  import tempfile
  from pathlib import Path
  from qlib.config import C
label_desc: Use image node_id 4 for calling the ObjManager obj's underlying member method code with example usage: obj.exists(name) without return types