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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_channel_name(self, group, index):
 """Gets channel name. Parameters group : int 0-based group index index : int 0-based channel index Returns ------- name : str found channel name """

        gp_nr, ch_nr = self._validate_channel_selection(None, group, index)

        return self.groups[gp_nr].channels[ch_nr].name