Why does the -keep rule work for a folder but not for all class members?

Question

Android

I have a rule to keep the whole folder -keep class com.nnn.domain_model.route.** {*;}and it works fine.
I wrote this rule in a different way, writing out all the models from the folder in order to understand which ones to keep by the method of elimination.
-keep class com.nnn.domain_model.route.A
-keep class com.nnn.domain_model.route.B
-keep class com.nnn.domain_model.route.C

But problems start in the application. How are these 2 methods different?

Answer 1

If you do not add {*;}, then the class names will not be obfuscated, but the internals will be.
{*;}they say that you need to keep the insides too, the class will be completely preserved in its original form.