Is there a way to check if an i18n key exists, or make it so that i18n.getI18nmessage returns an empty string or null value when the key does not exist instead of returning the key surrounding with exclamation marks?
i.e. i18n.getI18NMessage('my.non-existing-i18n.key') == null instead of i18n.getI18NMessage('my.non-existing-i18n.key') == '!my.non-existing-i18n.key!'