@@ -81,7 +81,7 @@  | 
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| 81 | 81 | /**  | 
                                                        
| 82 | 82 | * @param array $options  | 
                                                        
| 83 | 83 | *  | 
                                                        
| 84 | - * @return array  | 
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| 84 | + * @return string|null  | 
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| 85 | 85 | */  | 
                                                        
| 86 | 86 | private function sanitizeOptions(array $options)  | 
                                                        
| 87 | 87 |      { |