parameters: (self)
docstring: An instant in time.
  
      See more at: https://www.hl7.org/fhir/datatypes.html#instant.
docstring_summary: An instant in time.
docstring_tokens: An instant in time .
function: def instant_cls(self) -> Type[message.Message]:
      """An instant in time.
  
      See more at: https://www.hl7.org/fhir/datatypes.html#instant.
      """
      raise NotImplementedError('Subclasses *must* implement instant_cls.')
function_tokens: def instant_cls ( self ) -> Type [ message . Message ] : raise NotImplementedError ( 'Subclasses *must* implement instant_cls.' )