∀ {X : Type u_1} [inst : TopologicalSpace X] {x y : X} (γ : Path x y) {f : ↑unitInterval → ↑unitInterval}
  (hfcont : Continuous f) (hf₀ : f 0 = 0) (hf₁ : f 1 = 1), Set.range ⇑(γ.reparam f hfcont hf₀ hf₁) = Set.range ⇑γ