* Returns the file name for the most recent OSCAR data layer to the specified date. If offset is non-zero, * the file name that many entries from

* Run a queue of functions as quickly as possible, passing * value to each.

* Initiates a competitive race, returning a promise that will resolve when * any one of the supplied promisesOrValues has resolved or will reject wh

* @returns {Function} a cancel function for a task.

* @returns {Object} the first argument if not null and not undefined, otherwise the second argument.