Why does this Kotlin method have enclosing backticks?

Question

What are the backticks used for in the snippet below?

Why add them around the fun is(amount:Int ):Boolean { ... }?

verifier.`is`(amount         


        

Answer 1

The backtick are a "workaround" to allow you to call methods that have a name representing a Kotlin keyword.

See kotlinlang:

Some of the Kotlin keywords are valid identifiers in Java: in, object, is, etc. If a Java library uses a Kotlin keyword for a method, you can still call the method escaping it with the backtick (`) character