@Retention(value=RUNTIME)
@Target(value=METHOD)
@Incubating
public @interface LanguageType

The following example demonstrates how to register a custom language type using a plugin with a LanguageType annotation.

 interface CustomLanguageSourceSet extends LanguageSourceSet {}
 class DefaultCustomLanguageSourceSet extends BaseLanguageSourceSet implements CustomLanguageSourceSet {}

 apply plugin: MySamplePlugin

 class MySamplePlugin extends RuleSource {
     @LanguageType
     void declareCustomLanguage(LanguageTypeBuilder builder) {
         builder.setLanguageName("custom")
         builder.defaultImplementation(DefaultCustomLanguageSourceSet)
     }
 }