+ /**
+ * A sticky generateRandomSessionId for the current JS execution context,
+ * cached within this class.
+ *
+ * @return {string} 64 bit integer in hex format, padded
+ */
+ stickyRandomId: function () {
+ if ( !stickyRandomSessionId ) {
+ stickyRandomSessionId = mw.user.generateRandomSessionId();
+ }
+
+ return stickyRandomSessionId;
+ },
+