Template options:
  -C, --Choice <choice>  my description
                         Type: choice
                           val1  
                         Default: def-val
                         Default if option is 
                         provided without a 
                         value: def-val-no-arg
  -C, --choice <choice>  my description
                         Type: choice
                           val2  
                         Default: def-val
                         Default if option is 
                         provided without a 
                         value: def-val-no-arg

