pub fn test_highlight(
loader: &Loader,
highlighter: &mut Highlighter,
highlight_config: &HighlightConfiguration,
source: &[u8],
) -> Result<usize>pub fn test_highlight(
loader: &Loader,
highlighter: &mut Highlighter,
highlight_config: &HighlightConfiguration,
source: &[u8],
) -> Result<usize>