@Override
    public String toString() {
        DurationUnit du = Util.selectDurationUnitForDisplay(globalStopWatch);
        return buildProfilerString(du, TOP_PROFILER_FIRST_PREFIX, TOTAL_ELAPSED, "");
    }
This method is used in tests.
slf4j-ext/src/main/java/org/slf4j/profiler/Profiler.java