old_contents: from girder.models.setting import Setting
  
  class SmqtkSetting(Setting):
      requiredSettings = ('IMAGE_SPACE_SMQTK_SIMILARITY_SEARCH',
                          'IMAGE_SPACE_SMQTK_IQR_URL',)
  
      def validateImageSpaceSmqtkSimilaritySearch(self, doc):
          return doc.rstrip('/')
  
      def validateImageSpaceSmqtkIqrUrl(self, doc):
          return doc.rstrip('/')
  
new_contents: from girder.models.setting import Setting
  from girder.plugins.imagespace.settings import ImageSpaceSetting
  
  class SmqtkSetting(ImageSpaceSetting):
      requiredSettings = ('IMAGE_SPACE_SMQTK_SIMILARITY_SEARCH',
                          'IMAGE_SPACE_SMQTK_IQR_URL',
                          'IMAGE_SPACE_SMQTK_NNSS_URL')
  
      def validateImageSpaceSmqtkSimilaritySearch(self, doc):
          return doc.rstrip('/')
  
      def validateImageSpaceSmqtkIqrUrl(self, doc):
          return doc.rstrip('/')
  
      def validateImageSpaceSmqtkNnssUrl(self, doc):
          return doc.rstrip('/')
  
subject: Add NNSS_URL setting