code: def cmdline_params(self, surface_sample_file_name, cell_file_name):
          
          parameters = []
  
          parameters += [surface_sample_file_name]
          parameters += [cell_file_name]
          parameters += [self._OUTPUT_FILE_NAME]
  
          return map(str, parameters)
docs: Synthesize command line parameters
  
          e.g. [ ['struct.vsa'], ['struct.cell']]