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node_modules/core-js/internals/string-trim-forced.js

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+'use strict';
+var PROPER_FUNCTION_NAME = require('../internals/function-name').PROPER;
+var fails = require('../internals/fails');
+var whitespaces = require('../internals/whitespaces');
+
+var non = '\u200B\u0085\u180E';
+
+// check that a method works with the correct list
+// of whitespaces and has a correct name
+module.exports = function (METHOD_NAME) {
+  return fails(function () {
+    return !!whitespaces[METHOD_NAME]()
+      || non[METHOD_NAME]() !== non
+      || (PROPER_FUNCTION_NAME && whitespaces[METHOD_NAME].name !== METHOD_NAME);
+  });
+};