Method newGroup

docs/app/js/sanddance-app.js:12609–12618

(key, clause)

            });
        }
        newGroup(key, clause) {
            const group = {
                key,
                clause,
                expressions: [
                    this.newExpression(0, null)
                ]
            };
            return group;
        }
        updateGroup(partialGroup, groupIndex) {
            const groups = [
                ...this.state.groups