update

I currently have a very big hook, with dozens of useStates, lots of them have empty arrays which trigger unncesary re-renders. But I don't know which is the one doing it each time wdyr logs it's output. I get:

Re-rendered because of hook changes: 
[hook useState result]
...diff

When would be very useful for me is:

Re-rendered because of hook changes:
[hook useState result] 

Description of issue or feature request:
During the traversal of the delegations tree, each targets metadata file is first loaded/downloaded and then "visited".
It would be convenient if Updater._load_targets directly returns the loaded metadata to avoid lookup on the next line.

Current behavior:

            # The metadata for 'role_name' must be downloaded/updated bef

If CPM_SOURCE_CACHE is set to an empty string, CPM fails with file DOWNLOAD error: cannot create directory '/cpm' - Specify file by full.

The demo apps are not straight-forward, a very basic hello world example would be great :)
thanks

pipupgrade --verbose (0|1|2..) for info, warning, error, etc.