:title
Get child keys

:sig
function keys(value : dval) dval

:params
value : source value

:returns
A list of child keys.

:content
`keys(value)` returns a new list of child keys. A scalar returns an empty list.

:example capy render
var user := dval({"name": "Ada", "role": "admin"})
print(join(sort(keys(user)), ","), "\n")

:see-group
dval-access
