yii\twig\Extension::resolveClassName PHP Method

    public function resolveClassName($className)
    {
        $className = Inflector::id2camel($className, '_');
        if (isset($this->aliases[$className])) {
            return $this->aliases[$className];
        }
        foreach ($this->namespaces as $namespace) {
            $resolvedClassName = $namespace . '\\' . $className;
            if (class_exists($resolvedClassName)) {
                return $this->aliases[$className] = $resolvedClassName;
            }
        }
        return $className;
    }