Null coalescing operator used with namespace constant results in warning

[borcic]

A pattern we have been using is to retrieve a value from a remote configuration, but fallback to a local constant if the remote value isn't defined.
For example:

url = m.config?.serviceUrls?.imageService ?? CommonConfigConst.imageServiceUrl

where CommonConfigConst.imageServiceUrl is defined as

namespace CommonConfigConst
    const imageServiceUrl = "https://<some server>/"
end namespace

The transpiler converts that to

url = (function(CommonConfigConst, m)
                __bsConsequent = m.config?.serviceUrls?.imageService
                if __bsConsequent <> invalid then
                    return __bsConsequent
                else
                    return "https://i<some server>/"
                end if
            end function)(CommonConfigConst, m)

When the channel is side loaded, we see a warning in the console:

BRIGHTSCRIPT: WARNING: unused variable 'commonconfigconst' in anonymous function in /<path to code>/ImageService.bs:62

It seems that the transpiler is inlining the constant, but treating the namespace as a variable.