jsinterop problem

I want to convert the following js code into Java code using Jsinterop:

var disWorld = new AMap.DistrictLayer.World({

    zIndex:10,

    styles:{

        'nation-stroke':function(props){

            //props:{type:Nation_Border_China/Nation_Border_Foreign}

            if(props.type=='Nation_Border_China'){

                return 'red'

            }else{

                return 'white'

            }

        },

        'coastline-stroke': [0.8, 0.63, 1, 1], 

        'fill':function(props){

            //props:{NAME_CHH,NAME_ENG,SOC}

            return getColorBySOC(props.SOC)

        }

    }

})

I am struggling with "nation-stroke". How do I implement it in Jsinterop? 

Thanks,

David

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