is one piece episode 835 filler?

With Perospero and the Big Mom Pirates about to assassinate the Vinsmoke Family, Sanji runs toward them. Nusstorte leaps to strike him with his sword, but Sanji blocks it.

Laurin and Dosmarche then attack, and Sanji works to get around them as well. However, he is then confronted by Daifuku again.

Outside the venue, Caesar exits the Mirro-World with Brûlée in tow. Brûlée pleads to not let her crewmates see her face so they do not kill her, but Caesar quiets her and looks forward to completing the mission and getting his heart back.