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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| 10 | View Code Duplication | final class Version20190709090034 extends AbstractMigration |
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| 11 | { |
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| 12 | public function up(Schema $schema): void |
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| 35 | public function down(Schema $schema): void |
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| 46 | } |
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