m2e.sourcelookup

Eclipse Plugin that provides Maven Dependencies as Source Container in JDT Launching Configuration.
Update site (P2 Repo): https://bjmi.github.io/update-site/

Note: Ensure artifact sources are present in local maven repository or enable Window > Preferences > Maven > Download Artifact Sources in Eclipse

Open Debug "Debug Configurations..." dialog

Maven Build > Source Tab > Add > Maven Dependencies ...

Finish