FileProgressCallback
typealias FileProgressCallback = (<Error class: unknown class>, <Error class: unknown class>, <Error class: unknown class>?) -> Unit
When doing file operations that may take a while, such as moving a file or copying a file, a progress callback is used to pass how far along that operation is to the application.
param
currentNumBytesthe current number of bytes in the operation.param
totalNumBytesthe total number of bytes in the operation.param
datauser data passed to the callback.