+--------------------+
                                        | ISelectIF          |
                                        +--------------------+
                                        | boolean select(IF) |.....
      +-----------------------------+   +-----------+--------+    :
      | ILoIF                       |       ^      / \            :
      +-----------------------------+       :     +---+           :
      | ILoF filter(ISelectIF pick) |. . . .:       |             :
      +-----------------------------+               |             :
               / \                                  |             :
               ---                   +--------------------+       :
                |                    | ShorterThan40000   |       :
    ----------------------           +--------------------+       :
    |                    |           | boolean select(IF) |       :
+---------+      +--------------+    +--------------------+       :
| MtLoIF  |      | ConsLoIF     |                                 :
+---------+      +--------------+                                 :
+---------+   +--| IF    first  |                                 :
              |  | ILoIF rest   |                                 :
              |  +--------------+                                 :
              v                                                   :
       +----------------+                                         :
       | ImageFile      |<. . . . . . . . . . . . . . . . . . . . .
       +----------------+
       | String name    |
       | int width      |
       | int height     |
       | String kind    |
       +----------------+


+------------------------------------------------------------+
| ExamplesILoIF                                              |
+------------------------------------------------------------+
| IF f1 = . . .(short)                                       |  
| IF f2 = . . .(long)                                        |
| IF f3 = . . .(short)                                       |
| ILoIF mtloif = new MtLoIF()                                |
| ILoIF alist ~ new ConsLoIF(f1, ... mtloif)                 |
| ILoIF shortlist ~ new ConsLoIF(f1, ... f3, mtloif)         |
|                                                            |
| ISelectIF shortfiles = new ShorterThan40000();             |
|                                                            |
| ... t.checkExpect(alist.filter(shortfiles), shortlist) ... |
+------------------------------------------------------------+