https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2013/09/07/howto-code-folding-in-netbeans-ide-source-code-editor.aspxAs explained near the end of https://ui.netbeans.org/docs/ui/code_folding/cf_uispec.html, the NetBeans IDE source code editor supports custom code folding tags for any language, like below (here defining the code folding tag in a Java comment, obviouslyelCommunityServer 2.1 SP3 (Build: 20423.1)