/*@constant null mtContextNode mtContextNode_undefined@*/
# define mtContextNode_undefined ((mtContextNode) 0)
-extern /*@falsenull@*/ bool mtContextNode_isDefined (mtContextNode p_s) /*@*/ ;
+extern /*@falsewhennull@*/ bool mtContextNode_isDefined (mtContextNode p_s) /*@*/ ;
# define mtContextNode_isDefined(s) ((s) != mtContextNode_undefined)
extern cstring mtContextNode_unparse (mtContextNode) /*@*/ ;