GraphQlSource.GraphQlTester.WebGraphQlTester.WebGraphQlHandler instance.QuerydslDataFetcher.Builder accepting QuerydslPredicateExecutor
to build a DataFetcher.QuerydslDataFetcher.ReactiveBuilder accepting
ReactiveQuerydslPredicateExecutor to build a reactive DataFetcher.GraphQlSource given input for the initialization of
GraphQL and GraphQLSchema.GraphQlTester.WebGraphQlTester.WebGraphQlHandler.WebGraphQlHandler instance.