Ties multiple subscriptions to the lifetime of the component that calls useAllWhileMounted.
Given spread args of subscription-returning functions, gets the subscriptions from each
subscription factory at component mount time, and unsubscribes them all at unmount time.
Ties multiple subscriptions to the lifetime of the component that calls useAllWhileMounted. Given spread args of subscription-returning functions, gets the subscriptions from each subscription factory at component mount time, and unsubscribes them all at unmount time.