cellValueSelector = (state, props) => {
  const { griddleKey, columnId } = props;
  const cellProperties = cellPropertiesSelector(state, props);

  //TODO: Make Griddle key a string in data utils
  const lookup = state.getIn(['lookup', griddleKey.toString()]);

  const value = state
                .get('data').get(lookup)
                .getIn(columnId.split('.'));
  const type = !!cellProperties ? cellProperties.type : 'string';
  switch (type) {
    case 'date':
      return value.toLocaleDateString();
    case 'string':
    default:
      return value;
  }
}
Gets the count of visible rows