bulma/sass/helpers/border.scss

@use "../utilities/css-variables" as cv;
@use "../utilities/initial-variables" as iv;

$radii: (
  "small": "radius-small",
  "normal": "radius",
  "large": "radius-large",
  "rounded": "radius-rounded",
);

@each $name, $var in $radii {
  .#{iv.$class-prefix}#{iv.$helpers-has-prefix}radius-#{$name} {
    border-radius: cv.getVar($var);
  }
}