EmptyTrash Method
Permanently deletes all of the current user's trashed files.
Syntax
googledrive.emptyTrash([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 permanently deletes all of the current user's trashed files by emptying the trash for their "My Drive".
It is not possible to recover trashed files after this method is called!