Grails: inject bean from a config file (via grailsApplication) in resources.groovy directly without BootStrap.groovy

I used to do this: resources.groovy:

beans = {
        envSettings(ConcurrentHashMap) {bean ->
        /* k: String, v: String */
    }
}

And then in BootStrap.groovy:

String label = grailsApplication.config.getProperty('envSettings.label', String, 'N/A')
Boolean nonProd = grailsApplication.config.getProperty('envSettings.nonProd', Boolean, true)
envSettings["label"] = label
envSettings["nonProd"] = nonProd

It looks like we can do that without BootStrap.groovy. It's sooo simple. resources.groovy:

beans = {
	prefixDflt String, grailsApplication.config.getProperty("prefix.dflt", String, "")
}