[ '__default__' => [ 'interval' => 5, 'max_attempts' => 20, ], 'BucketExists' => [ 'operation' => 'HeadBucket', 'ignore_errors' => [ 'NoSuchBucket', ], 'success_type' => 'output', ], 'BucketNotExists' => [ 'operation' => 'HeadBucket', 'success_type' => 'error', 'success_value' => 'NoSuchBucket', ], 'ObjectExists' => [ 'operation' => 'HeadObject', 'ignore_errors' => [ 'NoSuchKey', ], 'success_type' => 'output', ], 'ObjectNotExists' => [ 'operation' => 'HeadObject', 'success_type' => 'error', 'success_value' => 'NoSuchKey', ], ],];