Is it possible to evaluate an expression within an ItemValue of a choice?

[kalpadiptyaroy]

Consider the following example to understand the query.

[
    {
        "type": "text",
        "name": "firstname"
    },
    {
        "type": "text",
        "name": "lastname"
    },
    {
        "type": "dropdown",
        "name": "fullnames",
        "choices": [
            {
                "text": "{firstname} + ' ' + {lastname}",  // will this work? if no, then what is a possible/correct way to do this?
                "value": "{firstname} + ' ' + {lastname}",
                "customprop": "{firstname} + ' ' + {lastname}"
            }
        ]
    }
]

[andrewtelnov]

@kalpadiptyaroy You can use calculated values here.

Thank you,
Andrew