src/Security/Password/Policy/PasswordPolicy.php
public function minUppercase($n)
    {
        $this->constraints[] = (function (Password $str) use ($n) {
            if (preg_match_all("/\\p{Lu}/", $str) < $n) {
                return sprintf("Password must contain at least %d uppercase letters.", $n);
            } else {
                return true;
            }
        });
        return $this;
    }
public function minUppercase($n)
    {
        $this->constraints[] = (function (Password $str) use ($n) {
            if (preg_match_all("/\\p{Lu}/", $str) < $n) {
                return sprintf("Password must contain at least %d uppercase letters.", $n);
            } else {
                return true;
            }
        });
        return $this;
    }
The minimum amount of uppercase letters (an uppercase letter that
has a lowercase variant, from any language)
@param int $n
@return $this