From @Wosi on October 13, 2015 14:22

I'm looking for a way to implement an advanced source highlighting
where a language service changes the color of words in a file. The result would look similar to the output Visual Studio creates in C# files.
The screenshot shows C# code in Visual Studio. The word "Customer" is highlighted differently based on its context:

To implement highlighting like this it's necassary to let a language service decide about the color of a word after the grammar based highlighter has done its job.
I would like to see an API for this in the future.

Copied from original issue: Microsoft/vscode-extensionbuilders#14