Menu items and page components are hidden in this application through the use of the following three expressions:
This expression sets the Rendered property to true if the user has "staff" as one of their roles. In other words, the field will only be displayed to staff.
We allow all authenticated users to access the products page, so we are going to display the link only to authenticated users.
This expression causes the link to be rendered only if the stock page (or more correctly its page def file) is viewable in the current security context.
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