question: protected Document createConfigurationDocument ( AVList params ) { Document doc = super . createConfigurationDocument ( params ) ; if ( doc == null || doc . getDocumentElement ( ) == null ) return doc ; DataConfigurationUtils . createWMSLayerConfigElements ( params , doc . getDocumentElement ( ) ) ; return doc ; }
target:  Appends WMS tiled image layer configuration elements to the superclass configuration document.