BlueJ 5 extension interface is not backwards compatible with BlueJ 4 extensions. Thus this extension no longer works with current versions of BlueJ. Additional information and reference: https://www.bluej.org/extensions/writingextensions2.html
BlueJ 5 extension interface is not backwards compatible with BlueJ 4 extensions. Thus this extension no longer works with current versions of BlueJ.
Additional information and reference:
https://www.bluej.org/extensions/writingextensions2.html