code: def to_array(self):
          
          array = super(InputContactMessageContent, self).to_array()
          array['phone_number'] = u(self.phone_number)  # py2: type unicode, py3: type str
          array['first_name'] = u(self.first_name)  # py2: type unicode, py3: type str
          if self.last_name is not None:
              array['last_name'] = u(self.last_name)  # py2: type unicode, py3: type str
          if self.vcard is not None:
              array['vcard'] = u(self.vcard)  # py2: type unicode, py3: type str
          return array
docs: Serializes this InputContactMessageContent to a dictionary.
  
          :return: dictionary representation of this object.
          :rtype: dict