@Override
  public String getString(int rowIndex, int columnIndex) {
    JsonNode jsonValue = _rowsArray.get(rowIndex).get(columnIndex);
    if (jsonValue.isTextual()) {
      return jsonValue.textValue();
    } else {
      return jsonValue.toString();
    }
  }
@Test
  public void testGetString() {
    // Run the test
    final String result = _resultTableResultSetUnderTest.getString(0, 0);

    // Verify the results
    assertEquals("r1c1", result);
  }