@Override
    public String toString() {
      return String.format(
          "[%x %s v%d %04x %04x %04x]",
          address, isStart ? "start" : "end", reg, nameIndex, typeIndex, signatureIndex);
    }
index of type signature in strings table
android/android_framework/dex-maker/src/main/java/com/android/dx/dex/file/DebugInfoDecoder.java