'Hook method. Function used to format a list of sender names.
Args:
senders (list): Sender object names.
Returns:
formatted_list (str): The list of names formatted appropriately.
Notes:
This function exists separately so that external sources
can use it to format source names in the same manner as
normal object/player names.'

def format_senders(self, senders=None):

    if (not senders):
        return ''
    return ',    '.join(senders)
