function accumulateDirectionalDispatches(inst, phase, event) {
  if (false) {}
  var listener = listenerAtPhase(inst, event, phase);
  if (listener) {
    event._dispatchListeners = accumulateInto(event._dispatchListeners, listener);
    event._dispatchInstances = accumulateInto(event._dispatchInstances, inst);
  }
}
Sets whether or not any created callbacks should be enabled.

@param {boolean} enabled True if callbacks should be enabled.