https://monticore.github.io/monticore/monticore-grammar/javadoc/de/monticore/types/mccollectiontypes/_ast/ASTMCMapTypeBuilder.html
ASTMCMapTypeBuilder (monticore-grammar 7.9.0-SNAPSHOT API)
declaration: package: de.monticore.types.mccollectiontypes._ast, class: ASTMCMapTypeBuilder
grammarsnapshotapi