public final class TestSynchronizedUnprotected {
   public final void test() {
      synchronized(this) {// 5
         System.out.println("test");// 6
      }
   }// 7
}

class 'TestSynchronizedUnprotected' {
   method 'test ()V' {
      3      2
      4      3
      7      3
      9      3
      e      5
   }
}

Lines mapping:
5 <-> 3
6 <-> 4
7 <-> 6
Not mapped:
8