provide an IContentListingObject adapter

[erral]

No description provided.

[mister-roboto]

@erral thanks for creating this Pull Request and helping to improve Plone!

TL;DR: Finish pushing changes, pass all other checks, then paste a comment:

@jenkins-plone-org please run jobs

To ensure that these changes do not break other parts of Plone, the Plone test suite matrix needs to pass, but it takes 30-60 min. Other CI checks are usually much faster and the Plone Jenkins resources are limited, so when done pushing changes and all other checks pass either start all Jenkins PR jobs yourself, or simply add the comment above in this PR to start all the jobs automatically.

Happy hacking!

[davisagli]

@erral Could you take a look at the failing tests, and add a new test which shows getting some values from the occurrence adapter?

[erral]

@jenkins-plone-org please run jobs

[davisagli]

I'm pretty sure this can be simplified to

Suggested change

	if hasattr(obj, name):
	return getattr(obj, name)
	raise AttributeError(name)
	return getattr(obj, name)

There's no need to check for the attribute before getting it. getattr will already raise AttributeError if it's not there.