Support highlight same variables,goto definition,goto implimentation

[infchaos]

Is there any way to support those features by roslyn? Ideas or api recommendations about these feature's implementation are welcome and helpful.
I try to get ideas from rename command and found it's a service provided directly by roslyn and it's implementation is non public and very complex to understand.

highlight same variables means when cursor falling onto a variable,all the same variable references are highlighted.
I am trying to implement these features by roslyn's symbolfinder functions but it always return empty results which makes me confusing.

[aelij]

• For "go to implementation" you can use IFindUsagesService, FindImplementationsAsync method.
• For highlighting I think IHighlightingService and IDocumentHighlightsService might do the trick.

Of course these are internal types but inside RoslynPad they are made public using IgnoresAccessChecksToGenerator.