get_size

Gets the number of values that were added to the set.

For example, if the set is empty, 0 is returned.

Note that this function returns a `guint64`, because when all values are set, the return value is `G_MAXUINT + 1`. Unless you are sure this cannot happen (it can't with `GListModel`), be sure to use a 64bit type.

Parameters:

this	a `GtkBitset`

Returns:

The number of values in the set.