https://github.com/ReactiveX/RxJava: Reactive Extensions for Java
  • David Karnok 
public interface io.reactivex.ObservableTransformer<Upstream, Downstream>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.reactivex.ObservableTransformer
  super_class: java.lang.Object
{
  public abstract io.reactivex.ObservableSource<Downstream> apply(io.reactivex.Observable<Upstream>);
    descriptor: (Lio/reactivex/Observable;)Lio/reactivex/ObservableSource;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Lio/reactivex/Observable<TUpstream;>;)Lio/reactivex/ObservableSource<TDownstream;>;
    RuntimeInvisibleAnnotations: 
      io.reactivex.annotations.NonNull()
    RuntimeInvisibleParameterAnnotations: 
      0:
        io.reactivex.annotations.NonNull()
    MethodParameters:
          Name  Flags
      upstream  
}
Signature: <Upstream:Ljava/lang/Object;Downstream:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "ObservableTransformer.java"