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:
| 1 | <?php  | 
            ||
| 5 | View Code Duplication | trait CompoundTrait  | 
            |
| 6 | { | 
            ||
| 7 | use OptionAccessorsTrait;  | 
            ||
| 8 | |||
| 9 | /**  | 
            ||
| 10 | * @param bool $compound  | 
            ||
| 11 | * @return bool  | 
            ||
| 12 | * @link http://symfony.com/doc/current/reference/forms/types/form.html#compound  | 
            ||
| 13 | */  | 
            ||
| 14 | public function setCompound($compound = true)  | 
            ||
| 18 | |||
| 19 | /**  | 
            ||
| 20 | * @return bool|string  | 
            ||
| 21 | * @link http://symfony.com/doc/current/reference/forms/types/form.html#compound  | 
            ||
| 22 | */  | 
            ||
| 23 | public function getCompound()  | 
            ||
| 27 | |||
| 28 | /**  | 
            ||
| 29 | * @return bool  | 
            ||
| 30 | * @link http://symfony.com/doc/current/reference/forms/types/form.html#compound  | 
            ||
| 31 | */  | 
            ||
| 32 | public function removeCompound()  | 
            ||
| 36 | }  | 
            ||
| 37 |