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Code Duplication    Length = 9-9 lines in 2 locations

src/Backend/ChainCache.php 2 locations

@@ 102-110 (lines=9) @@
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    /**
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     * {@inheritdoc}
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     */
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    public function delete($key)
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    {
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        $success = true;
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        foreach ($this->cache as $cache) {
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            $success = $success && $cache->delete($key);
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        }
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        return $success;
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    }
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    /**
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     * {@inheritdoc}
@@ 115-123 (lines=9) @@
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    /**
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     * {@inheritdoc}
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     */
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    public function flush()
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    {
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        $success = true;
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        foreach ($this->cache as $cache) {
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            $success = $success && $cache->flush();
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        }
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        return $success;
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    }
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    /**
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     * Gets the remaining time to live for an item