PHPStan\Rules\Cast\UselessCastRule::processNode PHP Method

    public function processNode(Node $node, Scope $scope) : array
    {
        if ($node instanceof Object_) {
            return [];
        }
        $expressionType = $scope->getType($node->expr);
        if ($expressionType->isNullable()) {
            return [];
        }
        $castType = $scope->getType($node);
        if (get_class($expressionType) === get_class($castType)) {
            return [sprintf('Casting to %s something that\'s already %s.', $castType->describe(), $expressionType->describe())];
        }
        return [];
    }