I'm trying to implement `find usages` for custom l...

# intellij-plugins

[aleksandrsl]

I'm trying to implement find usages for custom language, and I've done all steps as in http://www.jetbrains.org/intellij/sdk/docs/tutorials/custom_language_support/find_usages_provider.html
But, unfortunately, it doesn't work. Ability to use find usages indeed depends on canFindUsagesFor, but no usages are found. Does find usages functionality depends on any other extension?