syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"write!(self,"}]}
source_snippet:         write!(self, "b\"{}\"", byte_str.escape_ascii())?;
context_before:     fn pretty_print_byte_str(&mut self, byte_str: &'tcx [u8]) -> Result<(), PrintError> {
context_after:         Ok(())