Inherited methods:
from menu-item<%>
delete
get-parent
is-deleted?
restore

separator-menu-item% : class?

  superclass: object%

  extends: menu-item<%>
A separator is an unselectable line in a menu. Its parent must be a menu% or popup-menu%.

(new separator-menu-item% [parent parent])
  (is-a?/c separator-menu-item%)
  parent : (or/c (is-a?/c menu%) (is-a?/c popup-menu%))
Creates a new separator in the menu.