columnNames[i] = propertyProcessor.getDisplayName( );
	public String[] getColumnNames( String[] keys )	{		assert keys != null;		String[] columnNames = new String[keys.length];		for ( int i = 0; i < keys.length; i++ )		{			PropertyProcessor propertyProcessor = new PropertyProcessor( ReportDesignConstants.TABLE_GROUP_ELEMENT,					keys[i] );			columnNames[i] = propertyProcessor.getDisplayName( );		}		return columnNames;	}