Whether the native libical structure is from a global shared memory. If TRUE, then it is not freed on #ICalObject's finalize.
The native libical structure for this ICalObject.
GDestroyNotify function to use to destroy the native libical pointer.
Owner of the native libical structure. If set, then it is responsible for a free of the native libical structure.
Whether free the native libical structure on #ICalObject's finalize even if the object has set an owner.