text: class Adder{
      constructor(props){
          this.props = props;
  }
  
  sum(){
      return this.props.a + this.props.b;
  }
  
  render(){
      return `<p>this sum of ${this.props.a} and ${this.props.b} is ${this.sum()}</p>`;
      }
  }
  module.exports = Adder;