code: def revelation(self):
      missing = set()
      for key in self.fixed:
          if not dict.__contains__(self, key):
              self[key] = self.fixed[key]
              missing.add(key)
  
          if isinstance(self[key], (DogmaticDict, DogmaticList)):
              missing |= {key + "." + k for k in self[key].revelation()}
      return missing
  
imports: import copy
  import sacred.optional
  from sacred.utils import join_paths, SacredError
label_desc: Use image node_id 12 for calling the DogmaticDict obj's underlying member method code with example usage: obj.revelation() and returns: missing