LockFile Method
Locks a file resource.
Syntax
box.lockFile(fileId, expiration, allowDownloading, [callback])
Callback
The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).
The callback for this method is defined as:
function(err){ }
'err' is the error that occurred. If there was no error, then 'err' is 'null'.
'err' has 2 properties which hold detailed information:
err.code err.message
Remarks
This method locks the file resource specified by FileId to prevent others from modifying it.
Expiration may be set to an appropriately-formatted timestamp to specify an expiration time for the file lock. If Expiration is empty, the file lock will never expire. Timestamps are formatted according to RFC 3339.
AllowDownloading specifies whether others should still be allowed to download the file while it's locked.