Hiera boolean issue

hiera_boolean_param.pp

# original class
class dnsmasq (
    $service_enabled = true,
    $service_boot    = true,
    $service_managed = true,
){
    
    $service_ensure = $service_enabled ? {
        false   => stopped,
        default => running
    }
}

# Adjusted to work with  hiera (automatic class paramater lookups)
# which doesnt allow for boolean fields like
#  
# dnsmasq::service_enabled = false
#
# String as potential solution:
#
# dnsmasq::service_enabled = 'false'
#
# which would require patching like this:
#
class dnsmasq (
    $service_enabled = true,
    $service_boot    = true,
    $service_managed = true,
){
    
    $service_ensure = str2bool($service_enabled) ? {
        false   => stopped,
        default => running
    }
}