    # File lib/fog/ecloud/requests/compute/get_operating_system_families.rb, line 10
            def get_operating_system_families(uri)
              compute_pool_id = id_from_uri(uri)
              compute_pool    = self.data[:compute_pools][compute_pool_id]

              operating_system_families = self.data[:operating_system_families].values.select{|osf| osf[:compute_pool_id] == compute_pool_id}
              operating_system_families = operating_system_families.map{|osf| Fog::Ecloud.slice(osf, :id, :compute_pool_id)}.map{|osf| osf[:OperatingSystemFamily]}

              operating_system_family_response = {:OperatingSystemFamily => (operating_system_families.size > 1 ? operating_system_families : operating_system_families.first)} # GAH
              body = {
                :href  => uri,
                :type  => "application/vnd.tmrk.cloud.operatingSystemFamily; type=collection",
                :Links => {
                  :Link => compute_pool,
                }
              }.merge(operating_system_family_response)

              response(:body => body)
            end