gtk:tree-store-iter-is-valid (store iter)

store -- a gtk:tree-store object
iter -- a gtk:tree-iter iterator

True if iter is valid, nil if iter is invalid.

Checks if the given iter is a valid iterator for this gtk:tree-store object. This function is slow. Only use it for debugging and/or testing purposes. The gtk:tree-store implementation is deprecated since 4.10. Use the gtk:tree-list-model object instead.