def __init__(self, full_text, token_type, start, end):
     Span.__init__(self, full_text, start, end)
     self._token_type = token_type
 def __init__(self, full_text, start, end, indentation):
     Span.__init__(self, full_text, start, end)
     self._indentation = indentation
     self._tokens = list(self._tokenize())
 def __init__(self, full_text, start, end, type):
     Span.__init__(self, full_text, start, end)
     self._type = type