Add equals() for Resources.Theme

                }

            }

        }

        @Override

        public int hashCode() {

            return getKey().hashCode();

        }

        @Override

        public boolean equals(@Nullable Object o) {

            if (this == o) {

                return true;

            }

            if (o == null || getClass() != o.getClass() || hashCode() != o.hashCode()) {

                return false;

            }

            final Theme other = (Theme) o;

            return getKey().equals(other.getKey());

        }

    }

    static class ThemeKey implements Cloneable {