extensions/spring4-mvc/src/main/java/org/trimou/spring4/web/TrimouViewResolver.java
@Override
    public boolean isCache() {
        return engine.getConfiguration().getBooleanPropertyValue(EngineConfigurationKey.TEMPLATE_CACHE_ENABLED)
                && !engine.getConfiguration().getBooleanPropertyValue(EngineConfigurationKey.DEBUG_MODE)
                && super.isCache();
    }
@Override
    public boolean isCache() {
        return engine.getConfiguration().getBooleanPropertyValue(EngineConfigurationKey.TEMPLATE_CACHE_ENABLED)
                && !engine.getConfiguration().getBooleanPropertyValue(EngineConfigurationKey.DEBUG_MODE)
                && super.isCache();
    }
Returns true, if the cache of the {@link MustacheEngine} is enabled and the debug mode is disabled. Also Spring's
view resolution caching must be enabled.