+/*@constant null metaStateExpression metaStateExpression_undefined; @*/
+# define metaStateExpression_undefined ((metaStateExpression) NULL)
+
+extern /*@falsewhennull@*/ bool metaStateExpression_isDefined (metaStateExpression) /*@*/ ;
+# define metaStateExpression_isDefined(p_info) ((p_info) != NULL)
+
+extern /*@nullwhentrue@*/ bool metaStateExpression_isUndefined (metaStateExpression) /*@*/ ;
+# define metaStateExpression_isUndefined(p_info) ((p_info) == NULL)
+