Please provide a way to access the stage name from within the stage and its contents (like post).

Background

I have a multibranch declarative script. I am struggling with the limitation of one JenkinsFile per branch. I want to run various tasks (i.e. stages) on the branch (e.g. build several separate apps) and have a clear indication of which stage failed in the email notification subject sent on failure. I assume that stage processing will stop as soon as one stage fails. The post clause can then call the email-ext plugin and specify in Subject the stage that failed. Developers will then see quickly which task failed, rather than having to look through the console log (or email body).