code: public <A, B, T> RxLoader2<A, B, T> create(Func2<A, B, Observable<T>> observableFunc, RxLoaderObserver<T> observer) {
          return new RxLoader2<A, B, T>(manager, DEFAULT, observableFunc, observer);
      }
docs: Creates a new {@link me.tatarka.rxloader.RxLoader} that manages the given {@link
  rx.Observable}. It uses the {@link me.tatarka.rxloader.RxLoaderManager#DEFAULT} tag. This
  should be called in {@link android.app.Activity#onCreate(android.os.Bundle)} or similar.
  
  @param observableFunc the function that returns the observable to manage
  @param observer       the observer that receives the observable's callbacks
  @param <T>            the observable's value type
  @param <A>            the fist argument's type.
  @param <B>            the second argument's type.
  @return a new {@code RxLoader}
  @see me.tatarka.rxloader.RxLoader