func isIdent(n interface{}) *ast.Ident {
	id, _ := n.(*ast.Ident)
	return id
}
func isIdent(n interface{}) *ast.Ident {
	id, _ := n.(*ast.Ident)
	return id
}
func isIdent ( n interface { } ) * ast . Ident { id , _ := n . ( * ast . Ident ) return id }
// If n is an *ast.Ident, isIdent returns it; otherwise isIdent returns nil.
If n is an * ast . Ident isIdent returns it ; otherwise isIdent returns nil .