How can I define the variable "UITableViewScrollPositionNone" in Applescript-Objc?

I'm trying to select a row in a Table View using the following code:
NavigationTable's selectRowAtIndexPath_animated_scrollPosition_((IndexHandler's indexPathWithIndex_(1)), true, UITableViewScrollPositionNone)
(IndexHandler is the NSIndexPath class)
But when I run the code, I get the error:
The variable UITableViewScrollPositionNone is not defined.
How do I define "UITableViewScrollPositionNone", in Applescript-Objective-C?

For some strange reason, after admitting that I'm utterly lost, and after literal days of endless searching, I've found the proper snippet of code.
For those who need to select an NSTableView row in Applescript-Objc:
property IndexSetHandler : class "NSIndexSet"
set DefaultRow to (IndexSetHandler's indexSetWithIndex_(1))
NavigationTable's selectRowIndexes_byExtendingSelection_(DefaultRow, false)
Thank you both for all the help you've given me as well, and sorry for bothering you with previous response.

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