@Test
    public void test_4_3_depthSimplified() {
        int calleeDepth = 4;
        int callerDepth = 3;
        runTestSimplified(calleeDepth, callerDepth);
    }
USER -> WAS -> WAS -> WAS -> WAS(center) -> WAS -> WAS -> UNKNOWN
web/src/test/java/com/navercorp/pinpoint/web/applicationmap/ApplicationMapBuilderTest.java