docs: def numeric_literal_to_type(numlit: ShExDocParser.NumericLiteralContext) -> Union[jsg.Integer, jsg.Number]:
          """ numericLiteral: INTEGER | DECIMAL | DOUBLE """
          if numlit.INTEGER():
              rval = jsg.Integer(str(int(numlit.INTEGER().getText())))
          elif numlit.DECIMAL():
              rval = jsg.Number(str(float(numlit.DECIMAL().getText())))
          else:
              rval = jsg.Number(str(float(numlit.DOUBLE().getText())))
          return rval