3.0 Tree Behavior - understanding find('treeList')

I am using the 3.0 Tree Behavior.

I have the following from the docs:

$pages = $this->Pages->find('treeList');

http://book.cakephp.org/3.0/en/core-libraries/behaviors/tree.html

This just doesn't feel right.  It isn't returning a list at all.  Should I be doing something else, like:

$pages = $this->Pages->find('treeList')->all();

It just feels like I am missing something here.

When I put my $pages variable into my "'options' => $pages" for my form select, I get the following error:

Error: Function name must be a string
File /home/michael/public_html/bettornet/vendor/cakephp/cakephp/src/Collection/Iterator/TreePrinter.php
Line: 77

Any help with this would be appreciated.

Thanks in advance.
Michael

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