ImanX

//This generic function mechanism similar to the `guard` statement in Swift but in Kotlin


inline fun <reified T> T?.guard(block: (T?) -> Nothing): T {
    return this ?: block(this)
}

//This generic function mechanism simillar to the `apply` difference is that returning Unit.

@OptIn(ExperimentalContracts::class)

ImanX

public class Activity extends AppCompatActivity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        SingletonSharePrefrences.getInstance().putString("KEY_NAME" , "MACK");
    }
}

ImanX

//Now you can use it this way

 CoroutineScope(Dispatchers.IO).launch {
   val user = User();
   UserInfoAPI().add(user)
    
   UserInfoAPI().edit(user)
   
   UserInfoAPI().delete(10)
}