order  int      // sort order of const and var declarations (when we can't use a name)
	types  map[string]*namedType
	funcs  methodSet

	// support for package-local shadowing of predeclared types
	shadowedPredecl map[string]bool
	fixmap          map[string][]*ast.InterfaceType
}

func (r *reader) isVisible(name string) bool {
	return r.mode&AllDecls != 0 || token.IsExported(name)
}