public static void getAllKeys (@Nonnull final ColumnSet aColumnSet, @Nonnull final Collection <Key> aTarget) {
    """
	Get all contained keys
	
	@param aColumnSet
	The column set to scan. May not be <code>null</code>.
	@param aTarget
	The target collection to be filled. May not be <code>null</code>.
    """
    CollectionHelper.findAll (aColumnSet.getKeyChoice (), o -> o instanceof Key, o -> aTarget.add ((Key) o));
  }
public static void getAllKeys (@Nonnull final ColumnSet aColumnSet, @Nonnull final Collection <Key> aTarget)
  {
    CollectionHelper.findAll (aColumnSet.getKeyChoice (), o -> o instanceof Key, o -> aTarget.add ((Key) o));
  }
public static void getAllKeys ( @ Nonnull final ColumnSet aColumnSet , @ Nonnull final Collection < Key > aTarget ) { CollectionHelper . findAll ( aColumnSet . getKeyChoice ( ) , o -> o instanceof Key , o -> aTarget . add ( ( Key ) o ) ) ; }
Get all contained keys

@param aColumnSet
The column set to scan. May not be <code>null</code>.
@param aTarget
The target collection to be filled. May not be <code>null</code>.
Get all contained keys