code: def apply_filters(target, lines):
      
      filters = get_filters(target)
      if filters:
          for l in lines:
              if any(f in l for f in filters):
                  yield l
      else:
          for l in lines:
              yield l
docs: Applys filters to the lines of a datasource. This function is used only in
      integration tests. Filters are applied in an equivalent but more performant
      way at run time.