ParagonIE\CSPBuilder\CSPBuilder::preHash PHP Method

    public function preHash(string $directive = 'script-src', string $hash = '', string $algorithm = 'sha384') : self
    {
        $ruleKeys = \array_keys($this->policies);
        if (\in_array($directive, $ruleKeys)) {
            $this->policies[$directive]['hashes'][] = [$algorithm => $hash];
        }
        return $this;
    }