https://monticore.github.io/monticore/monticore-grammar/javadoc/de/monticore/grammar/grammar/_visitor/GrammarTraverserImplementation.html
GrammarTraverserImplementation (monticore-grammar 7.9.0-SNAPSHOT API)
declaration: package: de.monticore.grammar.grammar._visitor, class: GrammarTraverserImplementation
grammarsnapshotapi