'Update this dictionary with domain name/domain object pairs from
another dictionary.
When this dictionary contains a domain name which is in the other
dictionary, its value will be overwritten.
@type other: L{dict} of L{bytes} -> L{IDomain} provider and/or
L{bytes} -> L{None}
@param other: Another dictionary of domain name/domain object pairs.
@rtype: L{None}
@return: None.'

def update(self, other):

    return self.domains.update(other)
