core-bundle/src/Csrf/MemoryTokenStorage.php
public function getToken($tokenId): string
    {
        $this->assertInitialized();

        if (empty($this->tokens[$tokenId])) {
            throw new TokenNotFoundException(sprintf('The CSRF token ID "%s" does not exist.', $tokenId));
        }

        $this->usedTokens[$tokenId] = true;

        return $this->tokens[$tokenId];
    }
public function getToken($tokenId): string
    {
        $this->assertInitialized();

        if (empty($this->tokens[$tokenId])) {
            throw new TokenNotFoundException(sprintf('The CSRF token ID "%s" does not exist.', $tokenId));
        }

        $this->usedTokens[$tokenId] = true;

        return $this->tokens[$tokenId];
    }
{@inheritdoc}