Opencart check for the existance of a function in the model

check.php

// opencart 2.3, 3.x

private $_route = 'extension/module/pmp';
private $_model = 'model_extension_module_pmp';

$class_name = preg_replace('/[^a-zA-Z0-9]/', '', $this->_model);
if (is_callable([$class_name, 'getCachePrecomputedParams'])) {
	$result = $this->{$this->_model}->getCachePrecomputedParams();
}

// opencart 4

private $_route = 'extension/pmp/module/pmp'; 
private $_model = 'model_extension_pmp_module_pmp';

$class_name = 'Opencart\\' . $this->config->get('application') . '\Model\\' . str_replace(['_', '/'], ['', '\\'], ucwords($this->_route, '_/'));
if (method_exists($class_name, 'getCachePrecomputedParams')) {
	$result = $this->{$this->_model}->getCachePrecomputedParams();
}