Specifies the function to be called for focus tracker initialization. This function should be called
by an implementation of the ATK interface if any specific work needs to be done to enable focus tracking.
Gets a default implementation of the ObjectFactory
/type registry. Note: For most toolkit maintainers, this will be the correct registry for registering new
Object factories. Following a call to this function, maintainers may call
set_factory_type to associate an
ObjectFactory subclass with the GType of objects for whom accessibility
information will be provided.