text: import {GroupMark} from '../marks/marktypes';
  
  export default function(role, style, name, dataRef, interactive, encode, marks) {
    return {
      type: GroupMark,
      name: name,
      role: role,
      style: style,
      from: dataRef,
      interactive: interactive,
      encode: encode,
      marks: marks
    };
  }
  