You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: SelectionData.m
    path of file: ./repos/erplab/studio_functions/GUI Layout Toolbox/layout/+uix
    
    the code of the file until where you have to start completion: classdef( Hidden, Sealed ) SelectionData < event.EventData
    %uix.SelectionData  Event data for selection event
    %
    %  e = uix.SelectionData(o,n) creates event data including the old
    %  value
    
function obj = SelectionData( oldValue, newValue )
            %uix.SelectionData  Event data for selection event
            %
            %  e = uix.SelectionData(o,n) creates event data including the
            %  old value o and the new value n.
            
            % Set properties
            obj.OldValue = oldValue;
            obj.NewValue = newValue;
            
        end