I was told to store all strings needed for the applications in the .properties (so that future app localizations are easier to maintain) file which I did
Now I have to alter some of them so they contain some variables inside of them
for example
string "hey, you have a new message" should now be "hey, , you have a new message from " and the string should still be stored in the .properties file

What I have now:

* notifications.properties file with strings stored like
fcm.msg.new-message-body = "Hey, you have a new message"
* Config class that initializes said strings so I can use them

```
@Configuration
@ConfigurationProperties(prefix = "fcm.msg")
@PropertySource("classpath:notification.properties")
class FCMConfig {
    lateinit var newMessageBody: String

```