def render_charset(tags)
      charset = meta_tags.extract(:charset)
      tags << Tag.new(:meta, charset: charset) if charset.present?
    end
def render_charset(tags)
      charset = meta_tags.extract(:charset)
      tags << Tag.new(:meta, charset: charset) if charset.present?
    end
Renders charset tag.

 @param [Array<Tag>] tags a buffer object to store tag in.