WithLatestFromStreamTransformer<S, T, R>  constructor 
      
      WithLatestFromStreamTransformer<S, T, R> ()
     
    
Constructs a StreamTransformer that emits when the source Stream emits, combining
the latest values from latestFromStreams using the provided function fn.
Implementation
WithLatestFromStreamTransformer(this.latestFromStreams, this.combiner);