Difference with specification

[aleksandrsakov]

In a spec written that we should import Firebase. https://rnfirebase.io/#:~:text=At%20the%20top%20of%20the%20file%2C%20import%20the%20Firebase%20SDK%20right%20after%20%27import%20ReactAppDependencyProvider%27%3A

But here you import FirebaseCore

rnfbdemo/make-demo.sh

Line 103 in e70af5c

sed -i -e $'s/import UIKit/import UIKit\\\nimport FirebaseCore/' ios/rnfbdemo/AppDelegate.swift

What the difference and what should we use?