The folding GUI is an often neglected part of the IDE. It allows you to focus on the work at hand by hiding the unneeded parts of the code. What it didn't have so far in the NetBeans IDE was... style.
Actually style and an extra feature: the ability to close a fold by clicking at the end of it not just at the beginning. This is folding so far:
Note the familiar features:
tree-like GUI...
