Peeks to see @key is contained in the cache and returns the
matching #GObject if it does.
The reference count of the resulting #GObject is not incremented.
For that reason, it is important to remember that this function
may only be called from the main thread.
Peeks to see @key is contained in the cache and returns the matching #GObject if it does.
The reference count of the resulting #GObject is not incremented. For that reason, it is important to remember that this function may only be called from the main thread.