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node_modules/postcss/lib/warn-once.js

@@ -0,0 +1,13 @@
+/* eslint-disable no-console */
+'use strict'
+
+let printed = {}
+
+module.exports = function warnOnce(message) {
+  if (printed[message]) return
+  printed[message] = true
+
+  if (typeof console !== 'undefined' && console.warn) {
+    console.warn(message)
+  }
+}