(PHP 5 >= 5.5.0, PHP 7) Throw an exception into the generator
(PHP 5 >= 5.5.0, PHP 7) Resume execution of the generator
(PHP 5 >= 5.5.0, PHP 7) Send a value to the generator
(PHP 5 >= 5.5.0, PHP 7) Get the yielded value
(PHP 5 >= 5.5.0, PHP 7) Check if the iterator has been closed
(PHP 5 >= 5.5.0, PHP 7) Serialize callback
(PHP 5 >= 5.5.0, PHP 7) Get the yielded key
(PHP 7) Get the return value of a generator public
(PHP 5 >= 5.5.0, PHP 7) Rewind the iterator