@function  md-sys-shape-values() {
  @return (
    corner-extra-large: 28px,
    corner-extra-large-top: (28px 28px 0 0),
    corner-extra-small: 4px,
    corner-extra-small-top: (4px 4px 0 0),
    corner-full: 9999px,
    corner-large: 16px,
    corner-large-end: (0 16px 16px 0),
    corner-large-start: (16px 0 0 16px),
    corner-large-top: (16px 16px 0 0),
    corner-medium: 12px,
    corner-none: 0,
    corner-small: 8px
  );
}