text: import {Skip} from './constants';
  import {extendEncode} from '../encode/encode-util';
  
  export default function(mark, extras) {
    if (extras) {
      mark.name = extras.name;
      mark.style = extras.style || mark.style;
      mark.interactive = !!extras.interactive;
      mark.encode = extendEncode(mark.encode, extras, Skip);
    } else {
      mark.interactive = false;
    }
    return mark;
  }
  