code: public Datatype.Builder setBuilder(Type builder) {
      this.builder = Objects.requireNonNull(builder);
      _unsetProperties.remove(Property.BUILDER);
      return (Datatype.Builder) this;
    }
docs: Sets the value to be returned by {@link Datatype#getBuilder()}.
  
  @return this {@code Builder} object
  @throws NullPointerException if {@code builder} is null