private boolean getNextValue() {
        if (index >= arguments.length) {
          return false;
        }
        current = arguments[index];
        index++;
        return true;
      }
Similar to {@link #getNext()}, this moves on the to next argument. It does not check
however whether the argument starts with -- and thus can be used to retrieve values.
android/android_framework/dex-maker/src/main/java/com/android/dx/command/dexer/Main.java