def suggest(url)
      parameters = Specification.new(url: Types::URL).parameters(url: url)
      Suggestion.from_array(@client.get('/posts/suggest', parameters))
    end
def suggest(url)
      parameters = Specification.new(url: Types::URL).parameters(url: url)
      Suggestion.from_array(@client.get('/posts/suggest', parameters))
    end
List popular and recommended tags for a URL

 @example
   suggestion = posts.suggest(url)

 @param [String] url
   URL to fetch suggested tags for

 Returns a Hash with two entries, :popular is a list of popular tags,
 :recommended is a list of recommended tags.

 @return [Array<Suggestion>]

 @api public

 @see https://pinboard.in/api/#posts_suggest