syntax_data: {"ast_node_type":"variable","tokens":[{"end":52,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let src = self.file_loader.read_file(path)?;
context_before:     pub fn load_file(&self, path: &Path) -> io::Result<Arc<SourceFile>> {
context_after:         let filename = path.to_owned().into();