| io.reactivex.FlowableTransformer<Upstream, Downstream> | 
Interface to compose Flowables.
| Public Methods | |||||||||||
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| abstract Publisher<Downstream> | apply(Flowable<Upstream> upstream) Applies a function to the upstream Flowable and returns a Publisher with
 optionally different element type. | ||||||||||
Applies a function to the upstream Flowable and returns a Publisher with optionally different element type.
| upstream | the upstream Flowable instance | 
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