Code Duplication    Length = 9-9 lines in 2 locations

src/Set/SetAbstract.php 2 locations

@@ 36-44 (lines=9) @@
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		{
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			$iterator = $collection->iterator();
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			while($iterator->hasNext())
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			{
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				$element = $iterator->next();
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				if($this->contains($element))
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				{
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					$this->remove($element);
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					$changed = true;
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				}
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			}
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		}
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		else
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		{
@@ 50-58 (lines=9) @@
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		{
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			$iterator = $this->iterator();
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			while($iterator->hasNext())
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			{
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				$element = $iterator->next();
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				if($collection->contains($element))
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				{
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					$iterator->remove();
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					$changed = true;
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				}
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			}
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		}
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		return $changed;