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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_digraph_char(self, cli):
        " Return `False`, or the Digraph symbol to be used. "
        if cli.quoted_insert:
            return '^'
        if cli.vi_state.waiting_for_digraph:
            if cli.vi_state.digraph_symbol1:
                return cli.vi_state.digraph_symbol1
            return '?'
        return False