question: returns a new aggregate subscription whose #unsubscribe method calls unsubscribe on both this subscription and other subscription . concode_field_sep Subscription[] subscriptions concode_elem_sep Subscription EMPTY concode_elem_sep Subscription s1 concode_elem_sep Subscription s2 concode_field_sep void unsubscribe concode_elem_sep void unsubscribe concode_elem_sep void unsubscribe concode_elem_sep Subscription dynamic concode_elem_sep Subscription multi concode_elem_sep Subscription multi concode_elem_sep Subscription multi
target: Subscription function ( Subscription arg0 ) { return new BiSubscription ( this , arg0 ) ; }