0 * target._
    }

    def startWithHeader(String header) {
        return start(loggingHeader: header, shortDescription: header)
    }

    def handlesMultipleOperationsInProgressAtOnce() {
        ProgressLogEventGenerator generator = new ProgressLogEventGenerator(target)
        given:
        def firstStart = startWithHeader("task1")
        def secondStart = startWithHeader("task2")