How to stop massive logging by Birt Chart

While config for birt report gives direct api(EngineConfig) to change logging level birt chart doesn't.
Here's an alternative
            PlatformConfig config = new PlatformConfig( );
            config.setProperty(PluginSettings.PROP_LOGGING_DIR, null);
            config.setProperty(PluginSettings.PROP_LOGGING_LEVEL, Level.SEVERE);

This should stop mass logging by birt chart.