}

func writeFieldList(buf *bytes.Buffer, list []*ast.Field, sep string, iface bool) {
	for i, f := range list {
		if i > 0 {
			buf.WriteString(sep)
		}

		// field list names
		writeIdentList(buf, f.Names)

		// types of interface methods consist of signatures only
		if sig, _ := f.Type.(*ast.FuncType); sig != nil && iface {
			writeSigExpr(buf, sig)
			continue
		}