Iterate through the property list. The user should allocate a
* state variable of type void* and initialize it with NULL. A pointer
* to this variable should then be passed to pa_proplist_iterate()
* which should be called in a loop until it returns NULL which
* signifies EOL. The property list should not be modified during
* iteration through the list -- with the exception of deleting the
* current entry. On each invocation this function will return the
* key string for the next entry. The keys in the property list do not
* have any particular order. \since 0.9.11
Iterate through the property list. The user should allocate a * state variable of type void* and initialize it with NULL. A pointer * to this variable should then be passed to pa_proplist_iterate() * which should be called in a loop until it returns NULL which * signifies EOL. The property list should not be modified during * iteration through the list -- with the exception of deleting the * current entry. On each invocation this function will return the * key string for the next entry. The keys in the property list do not * have any particular order. \since 0.9.11