message: QueryContext tweak
diff: @@ -30,7 +30,7 @@ export class QueryContext implements QueryContextView {
  currentStructure: Structure = void 0 as any;
  /** Current link between atoms */
  - readonly atomicLink: Link.Location<Unit.Atomic> = void 0 as any;
  + readonly atomicLink: Link.Location<Unit.Atomic> = Link.Location() as Link.Location<Unit.Atomic>;
  setElement(unit: Unit, e: ElementIndex) {
  this.element.unit = unit;
  