MethodOverride is used to register a "go-native" implementation to be substituted to the default javascript implementation on the created object.

PropertyOverride is used to register a "go-native" implementation to be substituted to the default javascript implementation on the created object.

Override is a public interface implementing a private method `isOverride` implemented by the private custom type `override`.

FQN represents a fully-qualified type name in the jsii type system.