src/main/java/io/reactivex/parallel/ParallelFlowable.java
@CheckReturnValue
    @NonNull
    public final <R> ParallelFlowable<R> map(@NonNull Function<? super T, ? extends R> mapper) {
        ObjectHelper.requireNonNull(mapper, "mapper");
        return RxJavaPlugins.onAssembly(new ParallelMap<T, R>(this, mapper));
    }
@CheckReturnValue
    @NonNull
    public final <R> ParallelFlowable<R> map(@NonNull Function<? super T, ? extends R> mapper) {
        ObjectHelper.requireNonNull(mapper, "mapper");
        return RxJavaPlugins.onAssembly(new ParallelMap<T, R>(this, mapper));
    }
@ CheckReturnValue @ NonNull public final < R > ParallelFlowable < R > map ( @ NonNull Function < ? super T , ? extends R > mapper ) { ObjectHelper . requireNonNull ( mapper , "mapper" ) ; return RxJavaPlugins . onAssembly ( new ParallelMap < T , R > ( this , mapper ) ) ; }
Maps the source values on each 'rail' to another value.
<p>
Note that the same mapper function may be called from multiple threads concurrently.
@param <R> the output value type
@param mapper the mapper function turning Ts into Us.
@return the new ParallelFlowable instance
Maps the source values on each rail to another value . <p > Note that the same mapper function may be called from multiple threads concurrently .