if (isset(self::$proposals[$view])) {
      $best_proposals = [];
      $all_sources = [];
      foreach (self::$proposals[$view] as $proposal_source => $proposal) {
        if (!isset($this->backend_branch) || substr($this->backend_branch, 0, 11) != "adjust-for:" || substr($this->backend_branch, 11) == $proposal_source) {
          if ($proposal['orig_base'] == $curr_base || $relax_checking) {
            $age = time() - $proposal['updated_at'];
            if ($age < self::MAX_AGE) {
              foreach ($proposal['proposals'] as $proposal_label => $proposal_price) {
                if (!in_array($proposal_label, [self::SK_LABEL_AVIASALES, self::SK_LABEL_SKYSCANNER, self::SK_LABEL_YANDEX, self::SK_LABEL_MOMONDO])) {
                  $proposal_key = $proposal_label;
                  if (!isset($best_proposals[$proposal_key]) || $best_proposals[$proposal_key]['price'] > $proposal_price) {
                    $best_proposals[$proposal_key] = [
                      'price' => $proposal_price,
                      'name' => $proposal_price . "@" . implode("~", array_map(function ($part) {
                          return preg_replace('/[~|=#@ ]/', '_', $part);
                        }, [
                          'label' => $proposal_label,
                          'source' => $proposal_source,
                        ])),
                      'age' => $age,
                    ];
                    $all_sources[$proposal_source] = null;
                  }
                }
              }
            }
          }
        }
      }