| io.reactivex.ObservableOnSubscribe<T> | 
A functional interface that has a subscribe() method that receives
 an instance of an ObservableEmitter instance that allows pushing
 events in a cancellation-safe manner.
| Public Methods | |||||||||||
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| abstract void | subscribe(ObservableEmitter<T> e) Called for each Observer that subscribes. | ||||||||||
Called for each Observer that subscribes.
| e | the safe emitter instance, never null | 
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| Exception | on error | 
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