Supported Versions: PHP 4, PHP 5, PHP 7, PHP 8
Checks if the class method exists
<?php method_exists(object|string $object_or_class, string $method): bool
<?php     protected function createCallableMock()

    {

        if (method_exists('PHPUnit\Framework\MockObject\MockBuilder', 'addMethods')) {


            return $this->getMockBuilder('stdClass')->addMethods(array('__invoke'))->getMock();

        } else {