src/Component/Legacy.php
public function saveWithName($data, string $legacyName): void
    {
        $filename = $this->getLegacyFullPath($legacyName);
        $this->log('Saving data as Legacy "%s" to file "%s"', $legacyName, $filename);
        $this->debug('Legacy data: %s', $this->getPrintableValue($data));

        if (@file_put_contents($filename, serialize($data)) === false) {
            throw new LegacyException('Cannot save Legacy to file ' . $filename);
        }
    }
public function saveWithName($data, string $legacyName): void
    {
        $filename = $this->getLegacyFullPath($legacyName);
        $this->log('Saving data as Legacy "%s" to file "%s"', $legacyName, $filename);
        $this->debug('Legacy data: %s', $this->getPrintableValue($data));

        if (@file_put_contents($filename, serialize($data)) === false) {
            throw new LegacyException('Cannot save Legacy to file ' . $filename);
        }
    }
Store legacy of test under a custom name

@param string $legacyName filename to store the data if null getLegacyFilename is called to generate filename
from the test class name
@throws LegacyException