{
    "name": "Cons",
    "result_type": "List[a]",
    "call": ":[first,second]",
    "args": [
        {
            "arg_name": "first",
            "arg_type": "a"
        },
        {
            "arg_name": "second",
            "arg_type": "List[a]"
        }
    ],
    "title":"cons: append to the front of a list"
}
