func isEmptyString(n ast.Expr) bool {
	lit, ok := n.(*ast.BasicLit)
	return ok && lit.Kind == token.STRING && len(lit.Value) == 2
}
func isEmptyString(n ast.Expr) bool {
	lit, ok := n.(*ast.BasicLit)
	return ok && lit.Kind == token.STRING && len(lit.Value) == 2
}
func isEmptyString ( n ast . Expr ) bool { lit , ok := n . ( * ast . BasicLit ) return ok && lit . Kind == token . STRING && len ( lit . Value ) == 2 }
// isEmptyString returns true if n is an empty string literal.
isEmptyString returns true if n is an empty string literal .