It indexes classes and methods (symbols)in your project folders based on the syntax definition of the language in the file. You can then look up and search all

It indexes classes and methods (symbols)in your project folders based on the syntax definition of the language in the file. You can then look up and search all symbols in your project, or Go to a symbol where your cursor is. It isn't "smart", so it doesn't know where you use which symbol, or which symbol is assigned to a variable. I haven't used it for mixed projects yet, so I can't say how it works there.