app/presenters/blacklight/document_presenter.rb in blacklight-7.14.1 vs app/presenters/blacklight/document_presenter.rb in blacklight-7.15.0

@@ -95,11 +95,15 @@
     # @option options [String] :value
     def field_value field_config, options = {}
       field_presenter(field_config, options).render
     end
 
+    def thumbnail_presenter_class
+      view_config.thumbnail_presenter || thumbnail_presenter
+    end
+
     def thumbnail
-      @thumbnail ||= thumbnail_presenter.new(document, view_context, view_config)
+      @thumbnail ||= thumbnail_presenter_class.new(document, view_context, view_config)
     end
 
     ##
     # Create <link rel="alternate"> links from a documents dynamically
     # provided export formats. Returns empty string if no links available.