// Adds the supplied column to the list.
AddObject()
{
  const columns = new LJCDataColumns();
  let column = new LJCDataColumn("Name");
  columns.AddObject(column);
  column = new LJCDataColumn("Sequence");
  column.Value = 1;
  columns.AddObject(column);

  column = columns.Retrieve("Sequence");
  let result = column.Value;

  // result:
  // 1
}