libspring-core-java 4.3.22-1~18.04 (amd64 binary) in ubuntu bionic

 Spring is a layered Java/J2EE application framework offering a lot of freedom
 to Java developers yet providing well documented and easy-to-use solutions for
 common practices in the industry.
 .
 This package provide org.springframework.core.jar : Core abstractions and
 utilities, source-level metadata support.