TweetStream: Exclude retweets

Question

Trying to build a Twitter app based on https://github.com/tweetstream/tweetstream. But at http://www.rubydoc.info/gems/tweetstream/TweetStream/Client -- how'd I go about ignoring retweets?

This works

TweetStream::Client.new.follow(14252, 53235) do |status|
  puts "#{status.text}"
end

Failed attempt at excluding retweets #1

# both block arg and actual block given (SyntaxError)

TweetStream::Client.new.follow(14252, 53235).reject(&:retweet) do |status|
  puts "#{status.text}"
end

Failed attempt at excluding retweets #2

# No errors but also no tweets appearing

TweetStream::Client.new.follow(14252, 53235) do |status|
  unless status.retweet
    puts "#{status.text}"
  end
end