* The callbacks may or may not be called ever, in any particular order.
* They are likely to be invoked when something WRITE_SYNC is used used.
* They should follow a caching pattern as shown below, so that any code
- * using the word will get it's result no matter what happens.
+ * using the work will get it's result no matter what happens.
* @code
* $result = null;
* $workCallback = function () use ( &$result ) {