code: public static <M extends Monad<?, M>, A> MaybeT<M, A> maybeT(Monad<Maybe<A>, M> mma) {
          return new MaybeT<>(mma);
      }
docs: Static factory method for lifting a <code>{@link Monad}&lt;{@link Maybe}&lt;A&gt;, M&gt;</code> into a
  {@link MaybeT}.
  
  @param mma the {@link Monad}&lt;{@link Maybe}&lt;A&gt;, M&gt;
  @param <M> the outer {@link Monad} unification parameter
  @param <A> the carrier type
  @return the {@link MaybeT}