func (c *CommentCounterPlugin) CheckFlags() error {
	for _, pattern := range c.pattern {
		matcher, err := regexp.Compile(pattern)
		if err != nil {
			return err
		}
		c.matcher = append(c.matcher, matcher)
	}
	return nil
}
func (c *CommentCounterPlugin) CheckFlags() error {
	for _, pattern := range c.pattern {
		matcher, err := regexp.Compile(pattern)
		if err != nil {
			return err
		}
		c.matcher = append(c.matcher, matcher)
	}
	return nil
}
// CheckFlags looks for comments matching regexes