64         protected object singleElement;  field in Antlr.Runtime.Tree.RewriteRuleElementStream
100             this.singleElement = null;  in RewriteRuleElementStream()
125             if (singleElement == null) { // no elements yet, track w/o list  in Add()
126                 singleElement = el;  in Add()
131             elements.Add(singleElement);  in Add()
132             singleElement = null;  in Add()
170                     return ToTree(singleElement);  in NextCore()
176             if (singleElement != null) {  in NextCore()
178                 return ToTree(singleElement);  in NextCore()
206                 return (singleElement != null && cursor < 1) ||
214                 if (singleElement != null) {