∀ {A : Type u} [inst : Ring A] {relations : Module.Relations A} {M : Type v} [inst_1 : AddCommGroup M]
  [inst_2 : Module A M] {f f' : relations.Quotient →ₗ[A] M},
  f = f' ↔ ∀ (g : relations.G), f (relations.toQuotient fun₀ | g => 1) = f' (relations.toQuotient fun₀ | g => 1)