Destructor (the emulated type of...). Does nothing right now, but is included for forward compatibility, so subclass destructors should always call it.
Push a new error handler on top of the error handler options stack. With this you can easily override the actual error handler for some code and restore it later with popErrorHandling.
This method is a wrapper that returns an instance of the configured error class with this object's default error handling applied. If the $mode and $options parameters are not specified, the object's defaults are used.