code-lab/node_modules/vuetify/lib/styles/tools/_radius.sass

@use 'sass:map'
@use '../settings'

@mixin radius($r, $important: false)
  &
    // Key exists within the $rounded variable
    @if (map.has-key(settings.$rounded, $r))
      border-radius: map.get(settings.$rounded, $r) if($important, !important, null)
    @else
      border-radius: $r if($important, !important, null)