<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 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)