radio testing grails

//radio.gsp
<g:radio name="myRadio" value="1" checked="${myModel.checked}" />

//action radio
def radio(){
    //[myModel: [checked: params.check]] //approach 1 (wrong way)

    [myModel: [checked: params.check?.toBoolean()]] //approach 2 (correct way)
}

//url
http://localhost:8080/MyApp/my/radio?check=true --> approach 1: radio checked -- approach 2: radio checked
http://localhost:8080/MyApp/my/radio?check=false --> approach 1: radio checked -- approach 2: radio unchecked
http://localhost:8080/MyApp/my/radio --> approach 1: radio unchecked -- approach 2: radio unchecked