// If a callback was provided, execute it
if( z.o.complete && z.o.complete.constructor == Function ) {
// Yes, this is a weird place for this, but it needs to be executed
// only once per cluster of effects.
// If the element is, effectively, hidden - hide it
// If a callback was provided, execute it
if( z.o.complete && z.o.complete.constructor == Function ) {
// Yes, this is a weird place for this, but it needs to be executed
// only once per cluster of effects.
// If the element is, effectively, hidden - hide it