| 1 | <?php  | 
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| 13 | class ValuelistService  | 
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| 14 | { | 
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| 15 | private static $instance;  | 
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| 16 | /**  | 
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| 17 | * @var Storage  | 
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| 18 | */  | 
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| 19 | protected $storage;  | 
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| 20 | |||
| 21 | /**  | 
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| 22 | * FileService constructor.  | 
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| 23 | */  | 
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| 24 | protected function __construct()  | 
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| 26 | |||
| 27 | /**  | 
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| 28 | * @return ValuelistService  | 
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| 29 | */  | 
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| 30 | public static function getInstance()  | 
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| 37 | |||
| 38 | /**  | 
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| 39 | * @param $slug  | 
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| 40 | * @return Valuelist  | 
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| 41 | */  | 
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| 42 | public static function get($slug)  | 
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| 49 | |||
| 50 | /**  | 
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| 51 | * @param Storage $storage  | 
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| 52 | */  | 
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| 53 | public function init(Storage $storage)  | 
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| 57 | }  | 
            
It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: