clone(parent) {
    var clone = new Media;
    clone.val = this.val.clone(parent, clone);
    clone.block = this.block.clone(parent, clone);
    clone.lineno = this.lineno;
    clone.column = this.column;
    clone.filename = this.filename;
    return clone;
  }
Clone this node.

@return {Media}
@api public