Question about modifying source code in managemented component libraries

[axellin]

When debug issues while developing application firmware, sometimes I need to add some
debug print (or some hard-code changes) to the library source code used by my application.
In the old days when the libraries are in esp-idf, I can just modify the code in esp-idf
and re-compile for testing.

But using idf-component-manager, it does not allow local modification of the
managemented component libraries.
I want to compile the local modified code in managemented component libraries for testing.
Is there any way to allow modify the code in managemented component libraries?
I don't find such documentation.