PHPStan finishes with errors

Problem/Motivation

Latest run (as of issue creation) on the 1.x-dev branch.

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  Line   src/OrangeDamMigrationDataManager.php                            
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  128    Call to deprecated method setTrackLastImported() of class        
         Drupal\migrate\Plugin\MigrationInterface:                        
         in drupal:10.1.0 and is removed from drupal:11.0.0. There is no  
         replacement.                                                     
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  Line   src/Plugin/Derivative/OrangeDamMigrationQueues.php                            
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  38     Unsafe usage of new static().                                                 
         💡 See:                                                                       
            https://phpstan.org/blog/solving-phpstan-error-unsafe-usage-of-new-static  
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  Line   src/Plugin/QueueWorker/OrangeDamDeletionQueueWorker.php                       
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  40     Unsafe usage of new static().                                                 
         💡 See:                                                                       
            https://phpstan.org/blog/solving-phpstan-error-unsafe-usage-of-new-static  
 ------ ------------------------------------------------------------------------------ 
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  Line   src/Plugin/migrate/process/OrangeDamProcessBase.php                           
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  45     Unsafe usage of new static().                                                 
         💡 See:                                                                       
            https://phpstan.org/blog/solving-phpstan-error-unsafe-usage-of-new-static  
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  Line   orange_dam.install                                                 
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  14     Variable $contentTypes in empty() always exists and is not falsy.  
  35     Variable $contentTypes in empty() always exists and is not falsy.  
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Proposed resolution

Resolve PHPStan issues.