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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_typecast(self):
 """Returns the typecast or ``None`` of this object as a string."""

        midx, marker = self.token_next_by(m=(T.Punctuation, '::'))
        nidx, next_ = self.token_next(midx, skip_ws=False)
        return next_.value if next_ else None