anchor.diff:     * Checks that every element of [expected] is also in [actual], and that
      * every element of [actual] is also in [expected].
      */
  -  @deprecated
     static void setEquals(Iterable expected,
                           Iterable actual,
                           [String reason = null]) {
  
positive.code: library Expect;
  
  /**
   * This class is *deprecated*.
   *
   * Expect is used for tests that do not want to make use of the
   * Dart unit test library - for example, the core language tests.
   * Third parties are discouraged from using this, and should use
   * the expect() function in the unit test library instead for
   * test assertions.
   */
  @deprecated
  class Expect {
    /**
     * Checks whether the expected and actual values are equal (using `==`).
     */
    @deprecated
    static void equals(var expected, var actual, [String reason = null]) {
      if (expected == actual) return;
      String msg = _getMessage(reason);
  
negative.code:    * Specialized equality test for strings. When the strings don't match,
     * this method shows where the mismatch starts and ends.
     */
    static void stringEquals(String expected,
                             String actual,
                             [String reason = null]) {
  