This annotation configures how Scala prints two-parameter generic types.

By default, types with symbolic names are printed infix; while types without them are printed using the regular generic type syntax.

Example of usage:

scala> class Map[T, U]defined class Mapscala> def foo: Int Map Int = ???foo: Map[Int,Int]scala> @showAsInfix class Map[T, U]defined class Mapscala> def foo: Int Map Int = ???foo: Int Map Int