code: def _unconvert(self, field_name):
      return field_name.replace(self.SPACER, ".")
  
imports: import ast
  import json
  import sys
  import urllib
  from wandb_gql import gql
  import wandb
  from wandb.apis import public
  from wandb.apis.attrs import Attrs
  from wandb.apis.paginator import Paginator
  from wandb.sdk.lib import ipython
label_desc: Use image node_id 7 for calling the PythonMongoishQueryGenerator obj's underlying member method code with example usage: obj._unconvert(field_name) and returns: field_name