abstract Any(Dynamic)

Any is a type that is compatible with any other in both ways.

This means that a value of any type can be assigned to Any, and vice-versa, a value of Any type can be assigned to any other type.

It's a more type-safe alternative to Dynamic, because it doesn't support field access or operators and it's bound to monomorphs. So, to work with the actual value, it needs to be explicitly promoted to another type.