_toContext: function (member, uriData, post, get, ctx) {
                var data = null;
                if (this.__options.toContext)
                    data = this.__options.toContext.call(this.__options.context, member, uriData, post, get, ctx);
                return data || (member in this.__options.contextMap ? this.__options.contextMap[member].call(this.__options.context, member, uriData, post, get, ctx) : null);