Grails 4.1.0.M1 "Accessing config through dot notation is deprecated"

[davidkron]

Im doing some Grails 4.1.0.M1 testing with some of our applications and I get a lot of warnings:

org.grails.config.NavigableMap: Accessing config through dot notation is deprecated, and it will be removed in a future release. Use 'config.getProperty(key, targetClass)' instead.

One such warning is generated by the ApplicationTabLib's meta tag:

    /**
     * Output application metadata that is loaded from application.yml and grails.build.info if it is present.
     *
     * @emptyTag
     *
     * @attr name REQUIRED the metadata key
     */
    Closure meta = { attrs ->
        if (!attrs.name) {
            throwTagError('Tag ["meta"] missing required attribute ["name"]')
        }
        return Metadata.current[attrs.name]
    }

The Metadata.current[attrs.name] seems to trigger the warning, as Metadata extends NavigableMap.