1 files changed, 11 insertions, 0 deletions
diff --git a/node_modules/is-generator-fn/index.js b/node_modules/is-generator-fn/index.js
new file mode 100644
index 000000000..77a2981ed
--- /dev/null
+++ b/node_modules/is-generator-fn/index.js
@@ -0,0 +1,11 @@
+'use strict';
+var toString = Object.prototype.toString;
+
+module.exports = function (fn) {
+	if (typeof fn !== 'function') {
+		return false;
+	}
+
+	return (fn.constructor && fn.constructor.name === 'GeneratorFunction') ||
+		toString.call(fn) === '[object GeneratorFunction]';
+};