code: func (c HTMLConfig) Class(kind Kind) string {
  	switch kind {
  	case String:
  		return c.String
  	case Keyword:
  		return c.Keyword
  	case Comment:
  		return c.Comment
  	case Type:
  		return c.Type
  	case Literal:
  		return c.Literal
  	case Punctuation:
  		return c.Punctuation
  	case Plaintext:
  		return c.Plaintext
  	case Tag:
  		return c.Tag
  	case HTMLTag:
  		return c.HTMLTag
  	case HTMLAttrName:
  		return c.HTMLAttrName
  	case HTMLAttrValue:
  		return c.HTMLAttrValue
  	case Decimal:
  		return c.Decimal
  	}
  	return ""
  }
docs: // Class returns the set class for a given token Kind.