Section Header
    + name := G_DIV_EXPR;
    - comment := "Frame representation base";
    - author := "Benoit Sonntag (bsonntag@loria.fr)";
Section Inherit
    + parent_g_binary_expr:Expanded G_BINARY_EXPR;
Section Public
    - make l:G_EXPR and r:G_EXPR <-
Size.
    - width_min:INTEGER <-
    - height_min:INTEGER <-
    - width_max:INTEGER <-
    - height_max:INTEGER <-
Update position.
    - set_position rac:AREA at (x,y:INTEGER) size (w,h:INTEGER) <-