@Override
          public boolean equals(Object obj) {
            return obj == this;
          }
Gets all of the collectable constant values used in this method, sorted by most used first.
Skips non-collectable consts, such as non-string object constants

@return {@code non-null;} list of constants in most-to-least used order
android/android_framework/dex-maker/src/main/java/com/android/dx/ssa/ConstCollector.java