function runAsync() {
	    return _runAsync.apply(this, arguments);
	  }
Toggle partial object linking behavior; used for building object references from
unique ID's. Does nothing in serial mode, because the object references already exist.
Subclasses can implement this (e.g., `ParallelBufferedRunner`)
@abstract
@param {boolean} [value] - If `true`, enable partial object linking, otherwise disable
@returns {Runner}
@chainable
@public
@example
// this reporter needs proper object references when run in parallel mode
class MyReporter() {
  constructor(runner) {
    this.runner.linkPartialObjects(true)
      .on(EVENT_SUITE_BEGIN, suite => {
	           // this Suite may be the same object...
      })
      .on(EVENT_TEST_BEGIN, test => {
        // ...as the `test.parent` property
      });
  }
}