syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"write!(self,"}]}
source_snippet:             write!(self, "{}", if first { "" } else { " + " })?;
context_before:         for ((bound_args_and_self_ty, is_async), entry) in fn_traits {
context_after:             write!(self, "{}", if paren_needed { "(" } else { "" })?;