1 files changed, 15 insertions, 0 deletions
diff --git a/node_modules/async/internal/onlyOnce.js b/node_modules/async/internal/onlyOnce.js
new file mode 100644
index 0000000..6ad721b
--- /dev/null
+++ b/node_modules/async/internal/onlyOnce.js
@@ -0,0 +1,15 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+exports.default = onlyOnce;
+function onlyOnce(fn) {
+    return function (...args) {
+        if (fn === null) throw new Error("Callback was already called.");
+        var callFn = fn;
+        fn = null;
+        callFn.apply(this, args);
+    };
+}
+module.exports = exports["default"];
+\ No newline at end of file