package java11;

public class TestJava11StringConcat {
   public String test1(String var1, int var2) {
      return var1 + var2;// 20
   }

   public String test2(String var1, int var2, Object var3) {
      return "(" + var1 + "-" + var2 + "---" + var3 + ")";// 24
   }
}

class 'java11/TestJava11StringConcat' {
   method 'test1 (Ljava/lang/String;I)Ljava/lang/String;' {
      2      4
      7      4
   }

   method 'test2 (Ljava/lang/String;ILjava/lang/Object;)Ljava/lang/String;' {
      3      8
      8      8
   }
}

Lines mapping:
20 <-> 5
24 <-> 9