docs: public TypeUsage.Builder clear() {
      TypeUsage_Builder defaults = new TypeUsage.Builder();
      start = defaults.start;
      end = defaults.end;
      type = defaults.type;
      scope = defaults.scope;
      _unsetProperties.clear();
      _unsetProperties.addAll(defaults._unsetProperties);
      return (TypeUsage.Builder) this;
    }