Function guideGroup

docs/app/js/sanddance-app.js:147561–147565

(mark)

const SymbolMark = "symbol";
const TextMark = "text";
function guideGroup(mark) {
    mark.type = GroupMark;
    mark.interactive = mark.interactive || false;
    return mark;
}
function lookup(spec, config) {
    const _ = (name, dflt)=>value(spec[name], value(config[name], dflt));
    _.isVertical = (s)=>Vertical === value(spec.direction, config.direction || (s ? config.symbolDirection : config.gradientDirection));