syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if self.files.borrow().source_files.is_empty() || sp.is_dummy() {
context_before:     ) -> (Option<Arc<SourceFile>>, usize, usize, usize, usize) {
context_after:             return (None, 0, 0, 0, 0);