docs: def process_args():
      """ 
      Parse command-line arguments.
      """
      parser = argparse.ArgumentParser()
  
      parser.add_argument('-I', type=str,
                          metavar='<Include directory>',
                          action='append',
                          help='Directory to be searched for included files')
                          
                          
      parser.add_argument('lems_file', type=str, metavar='<LEMS file>', 
                          help='LEMS file to be simulated')
                          
      parser.add_argument('-nogui',
                          action='store_true',
                          help="If this is specified, just parse & simulate the model, but don't show any plots")
                          
      parser.add_argument('-dlems',
                          action='store_true',
                          help="If this is specified, export the LEMS file as "+dlems_info)
      
      return parser.parse_args()