is bleach episode 235 filler?

In Ichigo Kurosaki's inner world, Hollow Ichigo points Zangetsu at Muramasa and grins before moving to Muramasa and slashing at him. When Muramasa blocks, Hollow Ichigo attacks him again.

Blocking once more, Muramasa notes that this is impressive as a laughing Hollow Ichigo pulls back before attacking Muramasa several times. Muramasa blocks each attack while noting that enlisting Hollow Ichigo will not be easy.

When Hollow Ichigo raises his blade over his head to attack, Muramasa slashes at him.