code: def get(self, slug):
          
          kb = api.get_kb_by_slug(slug)
  
          # check if is accessible from api
          check_knowledge_access(kb)
  
          parser = reqparse.RequestParser()
          parser.add_argument(
              'from', type=str,
              help="Return only entries where key matches this.")
          parser.add_argument(
              'to', type=str,
              help="Return only entries where value matches this.")
          parser.add_argument('page', type=int,
                              help="Require a specific page")
          parser.add_argument('per_page', type=int,
                              help="Set how much result per page")
          parser.add_argument('match_type', type=str,
                              help="s=substring, e=exact, sw=startswith")
          parser.add_argument('sortby', type=str,
                              help="the sorting criteria ('from' or 'to')")
          args = parser.parse_args()
          kb_dict = kb.to_dict()
          kb_dict['mappings'] = KnwKBMappingsResource \
              .search_mappings(kb=kb, key=args['from'], value=args['to'],
                               match_type=args['match_type'],
                               sortby=args['sortby'], page=args['page'],
                               per_page=args['per_page'])
          return kb_dict
docs: Get KnwKB.
  
          Url parameters:
              - from: filter "mappings from"
              - to: filter "mappings to"
              - page
              - per_page
              - match_type: s=substring, e=exact, sw=startswith
              - sortby: 'from' or 'to'