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node_modules/core-js/modules/esnext.set.map.js

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+'use strict';
+var $ = require('../internals/export');
+var bind = require('../internals/function-bind-context');
+var aSet = require('../internals/a-set');
+var SetHelpers = require('../internals/set-helpers');
+var iterate = require('../internals/set-iterate');
+
+var Set = SetHelpers.Set;
+var add = SetHelpers.add;
+
+// `Set.prototype.map` method
+// https://github.com/tc39/proposal-collection-methods
+$({ target: 'Set', proto: true, real: true, forced: true }, {
+  map: function map(callbackfn /* , thisArg */) {
+    var set = aSet(this);
+    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+    var newSet = new Set();
+    iterate(set, function (value) {
+      add(newSet, boundFunction(value, value, set));
+    });
+    return newSet;
+  }
+});