PHPStan\Rules\Methods\CallMethodsRule::processNode PHP Method

    public function processNode(Node $node, Scope $scope) : array
    {
        if (!is_string($node->name)) {
            return [];
        }
        if ($this->checkThisOnly && !$this->ruleLevelHelper->isThis($node->var)) {
            return [];
        }
        $type = $scope->getType($node->var);
        if (!$type->canCallMethods()) {
            return [sprintf('Cannot call method %s() on %s.', $node->name, $type->describe())];
        }
        $methodClass = $type->getClass();
        if ($methodClass === null || !$this->broker->hasClass($methodClass)) {
            return [];
        }
        $name = (string) $node->name;
        $methodClassReflection = $this->broker->getClass($methodClass);
        if (!$methodClassReflection->hasMethod($name)) {
            $parentClassReflection = $methodClassReflection->getParentClass();
            while ($parentClassReflection !== false) {
                if ($parentClassReflection->hasMethod($name)) {
                    return [sprintf('Call to private method %s() of parent class %s.', $parentClassReflection->getMethod($name)->getName(), $parentClassReflection->getName())];
                }
                $parentClassReflection = $parentClassReflection->getParentClass();
            }
            return [sprintf('Call to an undefined method %s::%s().', $methodClassReflection->getName(), $name)];
        }
        $methodReflection = $methodClassReflection->getMethod($name);
        $messagesMethodName = $methodReflection->getDeclaringClass()->getName() . '::' . $methodReflection->getName() . '()';
        if (!$scope->canCallMethod($methodReflection)) {
            return [sprintf('Cannot call method %s from current scope.', $messagesMethodName)];
        }
        $errors = $this->check->check($methodReflection, $node, ['Method ' . $messagesMethodName . ' invoked with %d parameter, %d required.', 'Method ' . $messagesMethodName . ' invoked with %d parameters, %d required.', 'Method ' . $messagesMethodName . ' invoked with %d parameter, at least %d required.', 'Method ' . $messagesMethodName . ' invoked with %d parameters, at least %d required.', 'Method ' . $messagesMethodName . ' invoked with %d parameter, %d-%d required.', 'Method ' . $messagesMethodName . ' invoked with %d parameters, %d-%d required.']);
        if ($methodReflection->getName() !== $name) {
            $errors[] = sprintf('Call to method %s with incorrect case: %s', $messagesMethodName, $name);
        }
        return $errors;
    }