ParametrizedRotationGates.XToA = new GateBuilder().
    setSerializedId("X^(A/2^n)").
    setSymbol("X^A/2ⁿ").
    setTitle("Parametrized X Gate").
    setBlurb("Rotates the target by input A / 2ⁿ'th of a half turn around the X axis.\n" +