This Variance in syntax is in fact quite subtle and can result in a "gotcha" and that is described by Bill Wagner in the write-up entitled Is effective similar to a allure. Note that When you have require to combine with One more resolver (for example CamelCasePropertyNamesContractResolver, just just take https://propertyingurugram.in/pm-to-launch-rs-200-cr-renovation-project-of-gurugram-railway-station/