extendedMethod

Extends a method to include UFCS functions in the calling context.

When calling an extended method of an object, the following locations are searched, in order, for a method or UFCS function with the given name:

1. The object itself.
2. The module where the object's type is defined.
3. The context module (by default, the module that contains the extended method call).

If no method or function is found, a compile-time error is generated.