src/stage-impl.js
function handleSendAction(event) {
  if (event.defaultPrevented) {
    return;
  }
  if (typeof this.filterAction === "function" && !this.filterAction(event)) {
    return;
  }
  event.stopPropagation();
  event.applyTo(this);
}
function handleSendAction(event) {
  if (event.defaultPrevented) {
    return;
  }
  if (typeof this.filterAction === "function" && !this.filterAction(event)) {
    return;
  }
  event.stopPropagation();
  event.applyTo(this);
}
------------------------------------------------------------------------------