This is an API plugin, which encapsulates Jenkins EnvInject Library and provides additional API for environment variable management within Jenkins plugins.
This API plugin is mainly used in the EnvInject Plugin, but it can be used in other plugins as well. As an API plugin, it guarantees backward compatibility of API and does not contribute any user-visible components by default.
See the plugin's GitHub Page: https://github.com/jenkinsci/envinject-api-plugin
See the plugin's Changelog: https://github.com/jenkinsci/envinject-api-plugin/blob/master/CHANGELOG.md