syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"write!(self,"}]}
source_snippet:                                 write!(self, "@")?;
context_before:                             if self.tcx().sess.opts.unstable_opts.span_free_formats {
context_after:                                 self.print_def_path(did.to_def_id(), args)?;