src/Linter/CachingLinter.php
public function lintSource($source)
    {
        $checksum = crc32($source);

        if (!isset($this->cache[$checksum])) {
            $this->cache[$checksum] = $this->sublinter->lintSource($source);
        }

        return $this->cache[$checksum];
    }
public function lintSource($source)
    {
        $checksum = crc32($source);

        if (!isset($this->cache[$checksum])) {
            $this->cache[$checksum] = $this->sublinter->lintSource($source);
        }

        return $this->cache[$checksum];
    }
{@inheritdoc}