code: public <A, T> RxLoader1<A, T> create(String tag, Func1<A, Observable<T>> observableFunc, RxLoaderObserver<T> observer) {
          return new RxLoader1<A, T>(manager, tag, observableFunc, observer);
      }
docs: Creates a new {@link me.tatarka.rxloader.RxLoader1} that manages the given {@link
  rx.Observable}. This should be called in {@link android.app.Activity#onCreate(android.os.Bundle)}
  or similar.
  
  @param tag            The loader's tag. This must be unique across all loaders for a given
  manager.
  @param observableFunc the function that returns the observable to manage
  @param observer       the observer that receives the observable's callbacks
  @param <A>            the argument's type.
  @param <T>            the observable's value type
  @return a new {@code RxLoader}
  @see me.tatarka.rxloader.RxLoader1