@Nonnull
  @ReturnsMutableCopy
  public static ICommonsList <Column> getAllColumns (@Nonnull final ColumnSet aColumnSet)
  {
    final ICommonsList <Column> ret = new CommonsArrayList<> ();
    getAllColumns (aColumnSet, ret);
    return ret;
  }
@ Nonnull @ ReturnsMutableCopy public static ICommonsList < Column > getAllColumns ( @ Nonnull final ColumnSet aColumnSet ) { final ICommonsList < Column > ret = new CommonsArrayList < > ( ) ; getAllColumns ( aColumnSet , ret ) ; return ret ; }
Get all contained columns

@param aColumnSet
The column set to scan. May not be <code>null</code>.
@return A non-<code>null</code> list of all columns. Never
<code>null</code> but maybe empty.