code: private function broadcastToPlatform($message, string $platform)
      {
          if ($this->debug) {
              $this->logger && $this->logger->notice(
                  "Message would have been sent to $platform",
                  [
                      'Message' => $message,
                  ]
              );
  
              return;
          }
  
          foreach ($this->sns->getPaginator('ListEndpointsByPlatformApplication', [
              'PlatformApplicationArn' => $this->arns[$platform],
          ]) as $endpointsResult) {
              foreach ($endpointsResult['Endpoints'] as $endpoint) {
                  if ($endpoint['Attributes']['Enabled'] == 'true') {
                      try {
                          $this->send($message, $endpoint['EndpointArn']);
                      } catch (\Exception $e) {
                          $this->logger && $this->logger->error(
                              "Failed to push to {$endpoint['EndpointArn']}",
                              [
                                  'Message' => $message,
                                  'Exception' => $e,
                                  'Endpoint' => $endpoint,
                              ]
                          );
                      }
                  } else {
                      $this->logger && $this->logger->info(
                          "Disabled endpoint {$endpoint['EndpointArn']}",
                          [
                              'Message' => $message,
                              'Endpoint' => $endpoint,
                          ]
                      );
                  }
              }
          }
      }
docs: Send a message to all devices on a platform.
  
  @param Message|string $message
  @param string         $platform