src/Components/S3FileSystem.php
public function blobExists($container = '', $name = '')
    {
        try {
            $this->checkConnection();

            return $this->blobConn->doesObjectExist($container, $name);
        } catch (\Exception $ex) {
            return false;
        }
    }
public function blobExists($container = '', $name = '')
    {
        try {
            $this->checkConnection();

            return $this->blobConn->doesObjectExist($container, $name);
        } catch (\Exception $ex) {
            return false;
        }
    }
Check if a blob exists

@param  string $container Container name
@param  string $name      Blob name

@return boolean