def css.rules.append
import gralha-css-style@0.1.0.1/css.bend as Cssimport Base
349def css.rules.append(xs: List<&2, CSSRule>, ys: List<&2, CSSRule>) -> List<&2, CSSRule>:
350 match xs:
351 case Nil{}: ys
352 case Con{h, t}: Con{h, css.rules.append(t, ys)}