get_kernel_command_line
Description:
Parameters:
| this | 
           the SettingMatch  | 
      
| idx | 
           index number of the kernel command line argument to return  | 
      
Returns:
| 
           the kernel command line argument at index   | 
      
| this | 
           the SettingMatch  | 
      
| idx | 
           index number of the kernel command line argument to return  | 
      
| 
           the kernel command line argument at index   |