* @param numberOfThreads - Number of threads for this pool.
* @param filePath - Path to an implementation of a `ThreadWorker` file, which can be relative or absolute.
* @param opts - Options for this fixed thread pool.
* @param numberOfThreads - Number of threads for this pool.
* @param filePath - Path to an implementation of a `ThreadWorker` file, which can be relative or absolute.
* @param opts - Options for this fixed thread pool.