callback = (err, entry) => {
								if (err) {
									if (this.logger) {
										this.logger.debug(
											`Error snapshotting context timestamp hash combination of ${path}: ${err.stack}`
										);
									}
									jobError();
								} else {
									contextTshs.set(
										path,
										/** @type {ResolvedContextTimestampAndHash | null} */
										(entry)
									);
									jobDone();
								}
							}
@param {(WebpackError | null)=} err error
@param {(ResolvedContextTimestampAndHash | null)=} entry entry
@returns {void}