for i, x := range list {
		if token.IsExported(x.Name) {
			hasExported = true
		} else {
			list[i] = underscore
		}
	}
	return hasExported
}

// hasExportedName reports whether list contains any exported names.
func hasExportedName(list []*ast.Ident) bool {
	for _, x := range list {
		if x.IsExported() {
			return true
		}
	}
	return false
}