public <T> void addExplicitExtension(@NotNull LanguageExtension<T> instance, @NotNull Language language, @NotNull T object) {
    instance.addExplicitExtension(language, object, myParentDisposable);
  }
public <T> void addExplicitExtension(@NotNull LanguageExtension<T> instance, @NotNull Language language, @NotNull T object)