code: def set_sample_type_default_stickers(portal):
      
      # Getting all sticker templates
      stickers = getStickerTemplates()
      sticker_ids = []
      for sticker in stickers:
          sticker_ids.append(sticker.get('id'))
      def_small_template = portal.bika_setup.getSmallStickerTemplate()
      def_large_template = portal.bika_setup.getLargeStickerTemplate()
      # Getting all Sample Type objects
      catalog = api.get_tool('bika_setup_catalog')
      brains = catalog(portal_type='SampleType')
      for brain in brains:
          obj = api.get_object(brain)
          if obj.getAdmittedStickers() is not None:
              continue
          obj.setAdmittedStickers(sticker_ids)
          obj.setDefaultLargeSticker(def_large_template)
          obj.setDefaultSmallSticker(def_small_template)
docs: Fills the admitted stickers and their default stickers to every sample
      type.