How to use the generator-jhipster/generators/client/prompts.askForClientTheme function in generator-jhipster

get prompting() {
        // The prompting phase is being overriden so that we can ask our own questions
        return {
            askForClient: prompts.askForClient,
            askForClientTheme: mainPrompts.askForClientTheme,
            askForClientThemeVariant: mainPrompts.askForClientThemeVariant,

            setSharedConfigOptions() {
                this.configOptions.clientFramework = this.clientFramework;
                this.configOptions.clientTheme = this.clientTheme;
                this.configOptions.clientThemeVariant = this.clientThemeVariant;
            }
        };
    }