// Gets the items that match the supplied names.
SelectItems()
{
  const columns = new LJCDataColumns();
  let column = columns.Add("Name");
  column = columns.Add("Sequence");

  const propertyNames = [
    "Sequence",
  ]
  const selected = columns.SelectItems(propertyNames);
  let result = selected.Count;
  let compare = 1;
  LJC.CheckValues("SelectItems()", result, compare);

  column = selected.RetrieveAtIndex(0);
  result = column.PropertyName;

  // result:
  // Sequence
}