Is it possible to choose the color for a given frame/function?

Hello,

I've been looking at https://github.com/jlfwong/speedscope/wiki/Importing-from-custom-sources.
I was wondering if it would be possible to choose the color in which a frame is represented.
For instance the color could represent which language/what kind of function it is, or whether the function is compiled or interpreted, etc.

* I looked at https://github.com/jlfwong/speedscope/blob/main/src/lib/file-format-spec.ts but could not see anything related to that.
* The collapsed stack format does not support it either, but the flamegraph.pl script has a `--color` palette option.
* The Google "Trace Event Format" seems to support a `cname`, but that doesn't seem used by SpeedScope.

Is there a way to specify the color of frames/functions with speedscope?

Start by reading src/lib/file-format-spec.ts and the linked custom-source documentation, then compare the collapsed stack format and Google Trace Event Format's cname support. Determine the supported input and rendering behavior needed for per-frame colors; done should include an agreed format, implementation, and documentation or tests.

Written by the indexing model from the issue text.