}

        boolean hasAncestor(Operation ancestor) {
            return hasAncestor({ it == ancestor })
        }

        boolean hasAncestor(Predicate<? super Operation> predicate) {
            return parent == null
                ? false
                : (predicate.test(parent) || parent.hasAncestor(predicate))
        }
    }

    static class OperationStatus {

        def compileJavaActions = events.operations.findAll { it.descriptor.displayName.matches('Execute .*( action [0-9]+/[0-9]+)? for :compileJava') }
        compileJavaActions.size() > 0
        compileJavaActions[0].hasAncestor { it.descriptor.displayName == 'Task :compileJava' }
    }

    @TargetGradleVersion('>=3.5 <5.1')
    def "generates events for worker actions (pre 5.1)"() {
        expect: