List of Deprecated functions

Hi 

I am working through an old CodeIgniter 3 book and was wondering whether there are resources/documentation
pointing out all the deprecated functions/items and the new ones supported by CI4.

For example to load a view in CI3 one would use 

Code:

$this->load->view('Helloview');

In CI4 one must use: 

Code:

return view('Helloview');

I will appreciate if someone can point me in the right direction so that I can complete the examples in the old CI3 book.