Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
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| 9 | class YouTubeConfiguration extends AbstractConfiguration implements Configuration |
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| 14 | View Code Duplication | public function __construct(array $configuration, LoggerInterface $logger = null) |
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| 31 | public function getCategoryMap() |
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