Can't set GraalJsExpressionHandler as expression handler

[dhruvil-patel]

Bean instantiation fails when in try to set the expressionhandler to GraalJsExpressionHandler as shown in the JavaConfig code example.

@configuration
public class PugConfig {

@Bean
public SpringTemplateLoader templateLoader() {
    SpringTemplateLoader templateLoader = new SpringTemplateLoader();
    templateLoader.setTemplateLoaderPath("classpath:/templates");
    templateLoader.setEncoding("UTF-8");
    templateLoader.setSuffix(".pug");
    return templateLoader;
}

@Bean
public PugConfiguration pugConfiguration() {
    PugConfiguration configuration = new PugConfiguration();
    configuration.setCaching(false);
    configuration.setTemplateLoader(templateLoader());
    //To use the new GraalJsExpressionHandler add this:
    configuration.setExpressionHandler(new GraalJsExpressionHandler());
    return configuration;
}

}

Note : Commenting the line which sets expression handler works.