src/main/java/com/helger/genericode/Genericode10Helper.java
@Nonnull
  @ReturnsMutableCopy
  public static ICommonsList <String> getAllColumnIDs (@Nonnull final ColumnSet aColumnSet)
  {
    final ICommonsList <String> ret = new CommonsArrayList<> ();
    getAllColumnIDs (aColumnSet, ret);
    return ret;
  }
@Nonnull
  @ReturnsMutableCopy
  public static ICommonsList <String> getAllColumnIDs (@Nonnull final ColumnSet aColumnSet)
  {
    final ICommonsList <String> ret = new CommonsArrayList<> ();
    getAllColumnIDs (aColumnSet, ret);
    return ret;
  }
Get the IDs of 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 column IDs. Never
<code>null</code> but maybe empty.