CompilationUnit:
  children:
    - namespace
    - use_statements:
        rule: UseStatement
        vec: true
    - module_level_declarations:
        rule: ModuleLevelDeclaration
Namespace:
  children:
    - ns_kw:
        rule: Ns
        skip: true
    - fqn:
        rule: Fqn
UseStatement:
  children:
    - use_kw:
        rule: Use
        skip: true
    - prefixes:
        rule: UseStatementPrefix
        vec: true
    - suffix:
        rule: UseStatementSuffix
ModuleLevelDeclaration:
  rules:
    - rule: Module
      build: ModuleDeclaration
    - rule: Interface
      build: InterfaceDeclaration
    - FunctionDefinition
    - PlatformFunction
ModuleDeclaration:
  children:
    - is_public:
        rule: Pub
        build:
          type: boolean
          on: rule_present
    - mod_kw:
        rule: Mod
        skip: true
    - identifier:
        rule: Identifier
    - declarations:
        rule: ModuleLevelDeclaration
        vec: true
Class:
  children:
    - is_public:
        rule: Pub
        build:
          type: boolean
          on: rule_present
    - class_kw:
        rule: ClassKw
        skip: true
    - identifier
    - generic_parameters
    - class_constructor
    - implements_list
    - class_level_declarations:
        rule: ClassLevelDeclaration
        vec: true