"    Input:  {
                (any_params)        - any command line parameters, some of which (being iterable) given as lists/ranges

                    Please note the expected command line syntax for iterable values:

                --alpha=val         - a single value of any type

                --beta,=10,20,30    - a list of values (comma-separated)
                --beta:=10:20:30    - a list of values (colon-separated)

                --delta:12:18       - a range of integer values (step=1 by default), inclusive of both lower and upper bounds.
                --delta:12:18:3     - a range of integer values (step=3), inclusive of both lower and upper bounds.
            }

    Output: {
                return              - return code =  0, if successful
                                                  >  0, if error
                (error)             - error text if return > 0
            }
    Test:
            ck iterate cmdgen --alpha,=11,22,33 --beta:-9:-7 --delta=single --gamma:=one:two:three
            ck iterate cmdgen --alpha,=11,22,33 --beta:-9:-7 --delta=single --gamma:=one:two:three --out=json
"