[解決済み] Expected to return a value at the end of arrow function" の警告を修正するにはどうすればよいですか？

  return this.props.comments.map((comment) => {
  
      if (comment.hasComments === true) {
      
        return (
          <div key={comment.id}>
          
            <CommentItem className="MainComment"/>

              {this.props.comments.map(commentReply => {
              
                if (commentReply.replyTo === comment.id) { 
                  return (
                    <CommentItem className="SubComment"/>
                 ) // return
                } // if-statement
              }) // map-function
              } // map-function __begin
            
          </div> // comment.id
          
        ) // return