Add new symbols to index

[nopancho]

Hallo,
I have a Groovy DSL that looks like this:

DEFINITION_A {
       DEFINITION_B
       DEFINITION_C
}

and in another file:

CODE: SELECT ALL
DEFINITION_B {
     ....
}
DEFINITION_C {
     ....
}

I want to be able to navigate to all definitions by typing ctrl-r. I have read that I could define or extend the groovy syntax file and specify a scope and a pattern for my symbols. Is that the the right way and if yes, where are the syntax files located that are shipped with sublime and how can I extend them. Thank you for any help

[duy]

This should help:

Where are .tmLanguage files stored for ST3

I've been looking for a while, but where are the ST3 .tmLanguage files? I can only find .tmLanguage.cache files in Application Data/Cache. I've used Everything to search my entire computer for them too.