func IsBlank(id ast.Expr) bool {
	ident, _ := id.(*ast.Ident)
	return ident != nil && ident.Name == "_"
}
func IsBlank(id ast.Expr) bool {
	ident, _ := id.(*ast.Ident)
	return ident != nil && ident.Name == "_"
}
func IsBlank ( id ast . Expr ) bool { ident , _ := id . ( * ast . Ident ) return ident != nil && ident . Name == " " }
// isBlank returns whether id is the blank identifier "_".
// If id == nil, the answer is false.
isBlank returns whether id is the blank identifier _ . If id == nil the answer is false .