Polyfill implements newer Ruby features into older versions.

Polyfill implements newer Ruby features into older versions. If the Ruby version already supports the polyfill then calling it does nothing. This is designed to allow gem maintainers to use newer methods and gain their advantages while retaining backwards compatibility. It can also be used for code that would like newer features but is not completely ready to upgrade Ruby versions. The polyfills are built using refinements so there is no monkey patching that may cause issues outside of your use.