class Github::Issues::Labels

def milestone(user_name, repo_name, milestone_id, params={})
  _update_user_repo_params(user_name, repo_name)
  _validate_user_repo_params(user, repo) unless user? && repo?
  _validate_presence_of milestone_id
  normalize! params
  response = get_request("/repos/#{user}/#{repo}/milestones/#{milestone_id}/labels", params)
  return response unless block_given?
  response.each { |el| yield el }
end