parameters: (self, key: Union[UUID, str])
docstring: Key can be a UUID or a string. Returns true if item in DB
docstring_summary: Key can be a UUID or a string. Returns true if item in DB
docstring_tokens: Key can be a UUID or a string . Returns true if item in DB
function: def __contains__(self, key: Union[UUID, str]) -> bool:
          """Key can be a UUID or a string. Returns true if item in DB"""
          pass
function_tokens: def __contains__ ( self , key : Union [ UUID , str ] ) -> bool : pass