Code Duplication    Length = 8-8 lines in 2 locations

sources/GenericCollections/Traits/DequeCommonMethods.php 2 locations

@@ 60-67 (lines=8) @@
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        $this->storage->push($element);
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    }
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    public function offerFirst($element)
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    {
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        if ('' !== $this->checkAddOffer($element)) {
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            return false;
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        }
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        $this->storage->unshift($element);
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        return true;
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    }
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    public function offerLast($element)
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    {
@@ 69-76 (lines=8) @@
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        return true;
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    }
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    public function offerLast($element)
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    {
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        if ('' !== $this->checkAddOffer($element)) {
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            return false;
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        }
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        $this->storage->push($element);
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        return true;
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    }
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    public function getFirst()
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    {