public function toBeSortedByKey()

in src/ExpectObj.hack [359:368]


  public function toBeSortedByKey<Tv>(
    (function(Tv): arraykey) $key_extractor,
    string $msg = '',
    mixed ...$args
  ): void where T as Traversable<Tv> {
    $msg = \vsprintf($msg, $args);

    $actual = $this->var;
    $this->assertIsSortedByKey($actual, $key_extractor, $msg);
  }