∀ {R : Type u_1} {B : Type u_2} {F : Type u_3} {E : B → Type u_4} [inst : Semiring R] [inst_1 : TopologicalSpace F]
  [inst_2 : TopologicalSpace B] [inst_3 : TopologicalSpace (Bundle.TotalSpace F E)] [inst_4 : AddCommMonoid F]
  [inst_5 : Module R F] [inst_6 : (x : B) → AddCommMonoid (E x)] [inst_7 : (x : B) → Module R (E x)]
  {e : Bundle.Trivialization F Bundle.TotalSpace.proj},
  (∀ b ∈ e.baseSet, IsLinearMap R fun x => (↑e ⟨b, x⟩).2) → Bundle.Trivialization.IsLinear R e