/**
* Start the coroutine.
*
* @param StrandInterface $strand The strand that is executing the coroutine.
*/
public function call(StrandInterface $strand)
{
$strand->suspend();
$this->promise->then(function ($value) use($strand) {
if ($this->promise) {
$strand->resumeWithValue($value);
}
}, function ($reason) use($strand) {
if ($this->promise) {
$strand->resumeWithException($this->adaptReasonToException($reason));
}
});
}
