Calls the given function for each of the keys in the GCache.
NOTE func is passed three parameters, the value and key of a cache
entry and the user_data. The order of value and key is different
from the order in which g_hash_table_foreach() passes key-value
pairs to its callback function !
Calls the given function for each of the keys in the GCache. NOTE func is passed three parameters, the value and key of a cache entry and the user_data. The order of value and key is different from the order in which g_hash_table_foreach() passes key-value pairs to its callback function !