add name to channels database and check if it contains a source
        path

        Parameters
        ----------
        channel_name : str
            name that needs to be added to the database
        entry : tuple
            (group index, channel index) pair

def add(self, channel_name, entry):
        """ add name to channels database and check if it contains a source
        path

        Parameters
        ----------
        channel_name : str
            name that needs to be added to the database
        entry : tuple
            (group index, channel index) pair

        """
        if channel_name:
            if channel_name not in self:
                self[channel_name] = [entry]
            else:
                self[channel_name].append(entry)

            if "\\" in channel_name:
                channel_name = channel_name.split("\\")[0]

                if channel_name not in self:
                    self[channel_name] = [entry]
                else:
                    self[channel_name].append(entry)