code: def pending_changes(self):
          
          if 'pending_changes' in self.data.links:
              return PendingChanges(self)
          raise UnsupportedEngineFeature(
              'Pending changes is an unsupported feature on this engine: {}'
              .format(self.type))
docs: Pending changes provides insight into changes on an engine that are
          pending approval or disapproval. Feature requires SMC >= v6.2.
  
          :raises UnsupportedEngineFeature: SMC version >= 6.2 is required to
              support pending changes
          :rtype: PendingChanges