text: from ucscGb.qa.tables.tableQa import TableQa
  from ucscGb.qa.tables.positionalQa import PositionalQa
  
  class PointerQa(PositionalQa):
      """
      A pointer type of table, for tables consisting of one row that is a pointer to a file.
      These are not themselves positional tables, but we do need to do at least one check (for
      label lengths) that positional tables get.
      """
  
      def validate(self):
          """Adds pointer-specific table checks to basic table checks."""
          TableQa.checkForUnderscores(self)
          PositionalQa.checkLabelLengths(self)
  
      def statistics(self):
          TableQa.statistics(self)
  