Environment Injector Plugin
org.jenkinsci.plugins.envinject.model.EnvInjectJobPropertyContributor in envinject
This extension point has no Javadoc documentation.
Implementations:
Shared Objects Plugin: org.jenkinsci.plugins.sharedobjects.SharedObjectJobProperty (view on GitHub)
Shared Objects Plugin: org.jenkinsci.plugins.sharedobjects.ToolInstallationJobProperty (view on GitHub)