Access to subAddress Property of Hyperlinks in Powerpoint Javascript API

Recently my company has me developing a Taskpane Add-in for Powerpoint using the Javascript API. Right now the API is still missing a 'subAddress' property for the Powerpoint.Hyperlink class. My heart's deepest longing is to add a slide to a presentation with existing slide-to-slide hyperlinks, check those hyperlinks for discrepancies between the slide ID and the text (ie: a Hyperlink reading '13' that now links to slide 14), and finally correct the text to the subaddress ID of the hyperlink in Javascript. It is my burning passion to do this for every hyperlink in my presentation with the push of a button. In the interest of all mankind I would ask that the 'subAddress' property of the hyperlinks be available for use in addition to the 'address' and 'screenTip' properties which now exist. To the microsoft dev who can grant me this boon I offer half my kingdom. Truly there is no dev more favoured than thee.