parameters: (self, text, subclass)
docstring: Adds a certain piece of text to the tree as a NavigableString
          subclass.
docstring_summary: Adds a certain piece of text to the tree as a NavigableString
          subclass.
docstring_tokens: Adds a certain piece of text to the tree as a NavigableString subclass .
function: def _toStringSubclass(self, text, subclass):
          """Adds a certain piece of text to the tree as a NavigableString
          subclass."""
          self.endData()
          self.handle_data(text)
          self.endData(subclass)
function_tokens: def _toStringSubclass ( self , text , subclass ) : self . endData ( ) self . handle_data ( text ) self . endData ( subclass )