Feature request: Add step back capability to Debugger for Java

[wilmarques]

VSCode has the support for step back debugging (https://github.com/microsoft/vscode/issues/7652) but the debugger has to implement the capability.

vscode-node-debug already did it (https://github.com/microsoft/vscode/issues/13705 & https://github.com/Microsoft/vscode-node-debug/issues/77).

Is it possible to implement this on Debugger for Java?

[sysulq]

Looking forward to the implementation of this feature!