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It uses Kotlin.tmLanguage.json. This JavaDoc explains how to integrate a TextMate lexer with NetBeans.
There are also contrib/groovy.grails and contrib/groovy.grailsproject.
| Language Feature Support | Status |
| File type recognition | √ |
| Project type | |
| Semantic syntax highlighting | √ |
| Formatting | √ |
| Braces matching | √ |
| Error Hints/Fixes/Suggestions | |
| Code completion | |
| Code templates | |
| Refactoring | |
| Debugging |
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