protected final String toStringWithInline(String extra) {
    StringBuilder sb = new StringBuilder(80);

    sb.append("Insn{");
    sb.append(position);
    sb.append(' ');
    sb.append(opcode);

    if (extra != null) {
      sb.append(' ');
      sb.append(extra);
    }

    sb.append(" :: ");

    if (result != null) {
      sb.append(result);
      sb.append(" <- ");
    }

    sb.append(sources);
    sb.append('}');

    return sb.toString();
  }
Returns the string form of this instance, with the given bit added in the standard location for
an inline argument.

@param extra {@code null-ok;} the inline argument string
@return {@code non-null;} the string form
android/android_framework/dex-maker/src/main/java/com/android/dx/rop/code/Insn.java