changeHwb method Null safety

SassColor changeHwb(
  1. {num? hue,
  2. num? whiteness,
  3. num? blackness,
  4. num? alpha}
)

Changes one or more of this color's HWB channels and returns the result.

Implementation

SassColor changeHwb({num? hue, num? whiteness, num? blackness, num? alpha}) =>
    SassColor.hwb(hue ?? this.hue, whiteness ?? this.whiteness,
        blackness ?? this.blackness, alpha ?? this.alpha);