Checking for attribute existence

I am debugging someone else's code in which they are checking the value of an attribute that doesn't always exist in a module.  What is the proper way to determine if an attribute exists before getting its value?  I've tried using:

if (currObj."Attribute Name" != null)

but I get an "unknown Object attribute" error.

Chris

Re: Checking for attribute existence
PekkaMakinen - Tue Jul 16 13:53:10 EDT 2019

In the current module

if (exists(attribute "Attribute Name"))

In any module m

AttrDef ad = find(m, "Attribute Name")

if (!null ad)