I need to easily navigate between upstream and downstream builds. Presently it is easy to navigate from downstream to upstream build because downstream build has upstream build as a cause. But navigating from upstream to downstream build is complicated when `wait: false` is used in the build step.

When `wait` it is set to false, a build is triggered. But there is no way for the pipeline to know which build that was.

When `wait` is false, the returned value is `org.codehaus.groovy.runtime.NullObject`.

What will be useful is to have a parameter where build is triggered, then step waits until it has an id and returns only then.

Or is there any other easy way to figure out triggered builds?