Method isExport

include/ast/component/declarator.h:110–112

    return std::holds_alternative<CoreAlias>(Decl);
  }
  bool isExport() const noexcept {
    return std::holds_alternative<CoreExportDecl>(Decl);
  }

private:
  std::variant<CoreImportDecl, std::unique_ptr<CoreDefType>, CoreAlias,