()) {
      return this._processTargetFront;
    }
    // Otherwise, ensure that we don't try to spawn more than one Target by
    // returning the pending promise
    if (this._targetFrontPromise) {
      return this._targetFrontPromise;
    }
    this._targetFrontPromise = (async () => {
      let targetFront = null;
      try {
        const targetForm = await super.getTarget();
        targetFront = await this._createProcessTargetFront(targetForm);
      } catch (e) {
        // This is likely to happen if we get a lot of events which drop previous
        // processes.
        console.log(
          `Request to connect to ProcessDescriptor "${this.id}" failed: ${e}`
        );
      }
      // Save the reference to the target only after the call to attach
      // so that getTarget always returns the attached target in case of concurrent calls
      this._processTargetFront = targetFront;
      // clear the promise if we are finished so that we can re-connect if
      // necessary
      this._targetFrontPromise = null;
      return targetFront;
    })();
    return this._targetFrontPromise;
  }

  destroy() {
    if (this._processTargetFront) {
      this._processTargetFront.destroy();
      this._processTargetFront = null;
    }
    this._targetFrontPromise = null;
    super.destroy();
  }
}

registerFront(ProcessDescriptorFront);
PK