Demo for query storing

Change-Id: I947bcac841992c3f6cfd01ab337c265b0d01cb70
diff --git a/node_modules/vinyl/lib/is-stream.js b/node_modules/vinyl/lib/is-stream.js
new file mode 100644
index 0000000..04882b4
--- /dev/null
+++ b/node_modules/vinyl/lib/is-stream.js
@@ -0,0 +1,15 @@
+'use strict';
+
+function isStream(stream) {
+  if (!stream) {
+    return false;
+  }
+
+  if (typeof stream.pipe !== 'function') {
+    return false;
+  }
+
+  return true;
+}
+
+module.exports = isStream;