code: def get_relationship_admin_session_for_family(self, family_id=None):
          
          if not family_id:
              raise NullArgument
          if not self.supports_relationship_admin():
              raise Unimplemented()
          ##
          # Need to include check to see if the familyId is found otherwise raise NotFound
          ##
          try:
              from . import sessions
          except ImportError:
              raise OperationFailed()
          try:
              session = sessions.RelationshipAdminSession(family_id,
                                                          proxy=self._proxy,
                                                          runtime=self._runtime)
          except AttributeError:
              raise OperationFailed()
          return session
docs: Gets the ``OsidSession`` associated with the relationship administration service for the given family.
  
          arg:    family_id (osid.id.Id): the ``Id`` of the ``Family``
          return: (osid.relationship.RelationshipAdminSession) - a
                  ``RelationshipAdminSession``
          raise:  NotFound - no family found by the given ``Id``
          raise:  NullArgument - ``family_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  Unimplemented - ``supports_relationship_admin()`` or
                  ``supports_visible_federation()`` is ``false``
          *compliance: optional -- This method must be implemented if ``supports_relationship_admin()``
              and ``supports_visible_federation()`` are ``true``*