{B : Type u_1} →
  {F : Type u_2} →
    {Z : Type u_4} →
      [inst : TopologicalSpace B] →
        [inst_1 : TopologicalSpace F] →
          {proj : Z → B} →
            [inst_2 : TopologicalSpace Z] → (e : Trivialization F proj) → {b : B} → b ∈ e.baseSet → ↑(proj ⁻¹' {b}) ≃ₜ F