old_contents: from waldur_mastermind.marketplace import processors
  from waldur_rancher import views as rancher_views
  
  
  class RancherCreateProcessor(processors.BaseCreateResourceProcessor):
      viewset = rancher_views.ClusterViewSet
      fields = (
          'name',
          'description',
          'nodes',
          'tenant_settings',
          'ssh_public_key',
      )
  
  
  class RancherDeleteProcessor(processors.DeleteResourceProcessor):
      viewset = rancher_views.ClusterViewSet
  
new_contents: from waldur_mastermind.marketplace import processors
  from waldur_rancher import views as rancher_views
  
  
  class RancherCreateProcessor(processors.BaseCreateResourceProcessor):
      viewset = rancher_views.ClusterViewSet
      fields = (
          'name',
          'description',
          'nodes',
          'tenant_settings',
          'ssh_public_key',
          'install_longhorn',
      )
  
  
  class RancherDeleteProcessor(processors.DeleteResourceProcessor):
      viewset = rancher_views.ClusterViewSet
  
subject: Add new field to Processor