Error when Defining Equivalence within a Schema.Class

class EmailClass extends Schema.Class<EmailClass>()({
  email: Email,
}) {
  public isEmailEquivalentTo(anotherEmail: EmailClass): boolean {
    return Equivalence.make(EmailClass)(this, anotherEmail);
  }
}

const emailA = new EmailClass({ email: "[email protected]" });
const emailB = new EmailClass({ email: "[email protected]" });
const emailC = new EmailClass({ email: "[email protected]" });

console.log(emailA.isEmailEquivalentTo(emailB));//OutputExpected: false
console.log(emailA.isEmailEquivalentTo(emailC));//OutputExpected: true