'Merge information from another PhoneNumberDesc object into this one.'

def merge_from(self, other):

    if (other.national_number_pattern is not None):
        self.national_number_pattern = other.national_number_pattern
    if (other.possible_number_pattern is not None):
        self.possible_number_pattern = other.possible_number_pattern
    if (other.example_number is not None):
        self.example_number = other.example_number
