registration(registration: Registration) - In addition to the built-in singleton and transient registrations, you can create your own and associate it with a class. We'll discuss this in more detail in the DI customization article.
I can't find a "DI customization article", thus registration doesn't not appear to be explained.
In DI Basics/Explicit Configuration:
I can't find a "DI customization article", thus
registration
doesn't not appear to be explained.