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node_modules/@hapi/hoek/lib/once.js

@@ -0,0 +1,25 @@
+'use strict';
+
+const internals = {
+    wrapped: Symbol('wrapped')
+};
+
+
+module.exports = function (method) {
+
+    if (method[internals.wrapped]) {
+        return method;
+    }
+
+    let once = false;
+    const wrappedFn = function (...args) {
+
+        if (!once) {
+            once = true;
+            method(...args);
+        }
+    };
+
+    wrappedFn[internals.wrapped] = true;
+    return wrappedFn;
+};