Demo for query storing

Change-Id: I947bcac841992c3f6cfd01ab337c265b0d01cb70
diff --git a/node_modules/es-abstract/helpers/isLeadingSurrogate.js b/node_modules/es-abstract/helpers/isLeadingSurrogate.js
new file mode 100644
index 0000000..fec61b2
--- /dev/null
+++ b/node_modules/es-abstract/helpers/isLeadingSurrogate.js
@@ -0,0 +1,5 @@
+'use strict';
+
+module.exports = function isLeadingSurrogate(charCode) {
+	return typeof charCode === 'number' && charCode >= 0xD800 && charCode <= 0xDBFF;
+};