// This function is required and used by the background-image mixin.
@function radial-gradient($pos, $shape-size,
                       $G1,        $G2,
                       $G3: false, $G4: false,
                       $G5: false, $G6: false,
                       $G7: false, $G8: false,
                       $G9: false, $G10: false) {

  $type: radial;
  $gradient: compact($pos, $shape-size, $G1, $G2, $G3, $G4, $G5, $G6, $G7, $G8, $G9, $G10);
  $type-gradient: append($type, $gradient, comma);

  @return $type-gradient;
}