/**
* Generates a hash for a given `filenameOrBlob`.
*
* @example
* hash(filename)
* => "68ac9064904d853a037a7a8f“
*
* @param filenameOrBlob [String] the filename
* @param mode [String,null] optional mode
* @return [String,null]
*/
function hash(filenameOrBlob, mode) {
}
JSDoc