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

    {

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


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

        } else {