@@ -160,6 +160,11 @@  | 
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| 160 | 160 | }  | 
                                                        
| 161 | 161 | }  | 
                                                        
| 162 | 162 | |
| 163 | + /**  | 
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| 164 | + * @param string $installedVersion  | 
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| 165 | + * @param string $packageVersion  | 
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| 166 | + * @param string[] $canBeUpgradedFrom  | 
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| 167 | + */  | 
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| 163 | 168 |  	public function isUpgradeAllowed($installedVersion, $packageVersion, $canBeUpgradedFrom){ | 
                                                        
| 164 | 169 |  		if (version_compare($installedVersion, $packageVersion, '<=')){ | 
                                                        
| 165 | 170 |  			foreach ($canBeUpgradedFrom as $allowedPreviousVersion){ |