Batch script

Here is a way to get a list of the wild values:

def listOfWildValues = datasourceinstanceProps.values().collect { it.wildvalue }

Here is a way to do as you wish with the wild values: 

datasourceinstanceProps.each { instance, instanceProperties ->
    instanceProperties.each {
        it ->
            def wildValue = it.wildValue
            // Do something with wild value
    }
}