Support for warnings?

Is there a way to show warnings?

I have a need to show warnings based on the rules existing in Validation framework, all I want is to highlight elements, but don't want to block the user from saving.

Start by reviewing the existing Validation framework and the 23-comment discussion on issue #136 to understand the proposed warning behavior. Done should mean rules can highlight elements while allowing the user to save, with the expected behavior agreed before implementation.

Written by the indexing model from the issue text.