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'use strict';
var $ = require('../internals/export');
var getBuiltIn = require('../internals/get-built-in');
var aCallable = require('../internals/a-callable');
var anObject = require('../internals/an-object');
var speciesConstructor = require('../internals/species-constructor');
var iterate = require('../internals/iterate');
// `Set.prototype.union` method
// https://github.com/tc39/proposal-set-methods
$({ target: 'Set', proto: true, real: true, forced: true }, {
union: function union(iterable) {
var set = anObject(this);
var newSet = new (speciesConstructor(set, getBuiltIn('Set')))(set);
iterate(iterable, aCallable(newSet.add), { that: newSet });
return newSet;
}
});