Code Duplication    Length = 3-3 lines in 2 locations

src/LightSaml/Model/Metadata/EntitiesDescriptor.php 2 locations

@@ 208-210 (lines=3) @@
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     */
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    public function addItem($item)
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    {
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        if (false == $item instanceof self && false == $item instanceof EntityDescriptor) {
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            throw new \InvalidArgumentException('Expected EntitiesDescriptor or EntityDescriptor');
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        }
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        if ($item === $this) {
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            throw new \InvalidArgumentException('Circular reference detected');
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        }
@@ 233-235 (lines=3) @@
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     */
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    public function containsItem($item)
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    {
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        if (false == $item instanceof self && false == $item instanceof EntityDescriptor) {
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            throw new \InvalidArgumentException('Expected EntitiesDescriptor or EntityDescriptor');
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        }
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        foreach ($this->items as $i) {
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            if ($i === $item) {
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                return true;