SMART datagrid v.1 > Classes > CellStyle
The style ID. 
It is used when refer this style in grid, etc.
    grid.registerCellStyle('style01', {
        background: '#880000',
        color: '#ffff00'
    });
    
    // Apply the style to one data cell.
    grid.setCellStyle(0, 'fleid', 'style01', true);