1    /*
2    Copyright 2000 by Ralph Hartley
3    This software is licenced under the terms of the
4    Gnu Public Licence
5    */
6    
7    /**
8     * Modifiable Symbol. <br>
9     * Symbols that implement this interface, are displayed int modified form
10    * when the Plan they belong to is hidden by another passage. (e.g. passage walls
11    * are painted as dotted or dashed lines.)
12    */
13   public interface Modable {}
14