∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.MonoidalCategory C]
  {X Y : CategoryTheory.Mon C} {P Q : Bimod X Y} (f : P.X ≅ Q.X),
  CategoryTheory.CategoryStruct.comp P.actLeft f.hom =
      CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategoryStruct.whiskerLeft X.X f.hom) Q.actLeft →
    CategoryTheory.CategoryStruct.comp P.actLeft f.hom =
      CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategoryStruct.whiskerLeft X.X f.hom) Q.actLeft