public ToolchainsBuilderRequestBuilder userToolchainsSource(Source userToolchainsSource) {
            this.userToolchainsSource = userToolchainsSource;
            return this;
        }

        public ToolchainsBuilderRequest build() {
            return new ToolchainsBuilderRequestBuilder.DefaultToolchainsBuilderRequest(
                    session, globalToolchainsSource, userToolchainsSource);
        }

     */
    @Nonnull
    default ToolchainsBuilderResult build(
            @Nonnull Session session, @Nonnull Source globalToolchainsSource, @Nonnull Source userToolchainsSource) {
        return build(ToolchainsBuilderRequest.build(session, globalToolchainsSource, userToolchainsSource));
    }