type PluType=(x:number,y:number)=>number

function sum(x:number,y:number):number{
    return x+y
}
const sum2:PluType=sum

type NameResolver=()=>string
type NameOrResolver=string|NameResolver

function getName(n:NameOrResolver):string{
    if(typeof n==="string"){
        return n
    }else{
        return n()
    }
}