The `goog.testing.AsyncTestCase.ControlBreakingException` Class

`goog.testing.AsyncTestCase.ControlBreakingException(opt_message)`

An exception class used solely for control flow.

opt_message {string=}: Error message.

`.TO_STRING` {`string`}

Return value for .toString().

`.message` {`string`}

The exception message.

`.toString()`