original_docstring: 
          Move the head index forward by one.
  
          :return:                - The new head character of the InputMessage.
          
docstring: Move the head index forward by one.
docstring_tokens: Move the head index forward by one .
code: def _step(self) -> str:
          """
          Move the head index forward by one.
  
          :return:                - The new head character of the InputMessage.
          """
          self.index = self.index + 1
          return self._head
code_tokens: def _step ( self ) -> str : self . index = self . index + 1 return self . _head
short_docstring: Move the head index forward by one.
short_docstring_tokens: Move the head index forward by one .
comment: """
          Move the head index forward by one.
  
          :return:                - The new head character of the InputMessage.
          """