CI 2.x->3.x Class Names?

I'm upgrading from CI 2.x to 3.x.  I see that I will be changing the case of class names to make them have initial caps. E.g.:

PHP Code:

application/libraries/mylibrary.php 


becomes:

PHP Code:

application/libraries/Mylibrary.php 


Question: do I also need to update references to that class in the code? E.g. do the following need to change as well?

PHP Code:

$this->load->library('mylibrary');

$this->mylibrary->myfunction(); 


...or, can I leave those unchanged?

Thanks in advance for the info