Custom Exception method

ContractException.php

<?php

namespace App\Exceptions;

use Exception;

class ContractException extends Exception
{
    public static function throwIf(bool $condition, string $method, ...$args)
    {
        if (! $condition) {
            if (method_exists(__CLASS__, $method)) {
                throw self::$method(...$args);
            }

            throw new self("Invalid exception method $method");
        }
    }

    public static function missingContract(string $class, string $contract)
    {
        return new self("$class did not implements $contract");
    }
}