This adds parent as a parent for object. Having one ore more parents affects the
writability of object: if a parent is not writable, object is also not
writable, regardless of its refcount. object is only writable if all
the parents are writable and its own refcount is exactly 1.
Note: This function does not take ownership of parent and also does not
take an additional reference. It is the responsibility of the caller to
remove the parent again at a later time.
This adds parent as a parent for object. Having one ore more parents affects the writability of object: if a parent is not writable, object is also not writable, regardless of its refcount. object is only writable if all the parents are writable and its own refcount is exactly 1.
Note: This function does not take ownership of parent and also does not take an additional reference. It is the responsibility of the caller to remove the parent again at a later time.