Bitset.getSize

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 [gst.types.ulong], because when all values are set, the return value is G_MAXUINT + 1. Unless you are sure this cannot happen (it can't with [gio.list_model.ListModel]), be sure to use a 64bit type.