Currently, https://github.com/kiegroup/appformer/blob/master/uberfire-workbench/uberfire-workbench-client-views-patternfly/src/main/java/org/uberfire/client/views/pfly/widgets/ConfirmPopup.java allows only a "OK/Cancel" behaviour; moreover, due to access modifiers used for its properties, and the lack of accessors to them, it is impossible to extend it.
What it is required is:
1) change modifiers/accessors, so to have make it "extendable"
2) insert code to allow also a "YES/NO/Cancel" behavior, as implemented with https://issues.jboss.org/browse/DROOLS-3053