code: def __delitem__(self, key):
      if key not in self.fixed:
          dict.__delitem__(self, key)
  
imports: import copy
  import sacred.optional
  from sacred.utils import join_paths, SacredError
label_desc: Use image node_id 10 for calling the DogmaticDict obj's underlying member method code with example usage: obj.__delitem__(key) without return types