class Param {
  constructor(...args) {
    this.firstName = args[0]
    this.lastName = args[1]
  }
  static parse(_, ...values) {
    return new Param(...values)
  }
}

let [name1, last1] = ["Ankit", "Anand"]

console.log(Param.parse`firstName:${name1}, lastName:${last1}`)