export default (function (o, c, d) {
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								  var proto = c.prototype;
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								  proto.dayOfYear = function (input) {
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								    // d(this) is for badMutable
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								    var dayOfYear = Math.round((d(this).startOf('day') - d(this).startOf('year')) / 864e5) + 1;
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								    return input == null ? dayOfYear : this.add(input - dayOfYear, 'day');
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								  };
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								});
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