syntax_data: {"ast_node_type":"other","tokens":[{"end":23,"kind":"keyword","start":0,"text":"self.push(\"B\");"}]}
source_snippet:         self.push("B");
context_before:     fn print_backref(&mut self, i: usize) -> Result<(), PrintError> {
context_after:         self.push_integer_62((i - self.start_offset) as u64);