src/Component/Legacy.php
public function load(string $type = self::LEGACY_TYPE_CASE)
    {
        return $this->loadWithName($this->getLegacyName($type));
    }
public function load(string $type = self::LEGACY_TYPE_CASE)
    {
        return $this->loadWithName($this->getLegacyName($type));
    }
Reads legacy of test getLegacyFilename is called to generate filename from the test class name.
Raises exception if it is not found.

@param string $type LEGACY_TYPE_CASE (shared by all tests in test case)
or LEGACY_TYPE_TEST (shared only by the same test function)
@throws LegacyException