line.go
func (l *line) isHelperMethodOf(name string) bool {
	return l.isHelperMethod() && l.tokens[1] == name
}
func (l *line) isHelperMethodOf(name string) bool {
	return l.isHelperMethod() && l.tokens[1] == name
}
// isHelperMethodOf returns true if the line is a specified helper method.