How to use the graphql-transformer-core.SyncUtils.isLambdaSyncConfig function in graphql-transformer-core

Fn.Ref(ResourceConstants.PARAMETERS.Env),
                            ]),
                            Fn.Join('-', [
                              SyncResourceIDs.syncTableName,
                              Fn.GetAtt(ResourceConstants.RESOURCES.GraphQLAPILogicalID, 'ApiId'),
                            ])
                          ),
                        }),
                      ]
                    : []),
                ],
              },
            ],
          },
        }),
        ...(syncConfig && SyncUtils.isLambdaSyncConfig(syncConfig)
          ? [SyncUtils.createSyncLambdaIAMPolicy(syncConfig.LambdaConflictHandler)]
          : []),
      ],
    });
  }