syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"CharPos(bpos.to_usize()"}]}
source_snippet:         CharPos(bpos.to_usize() - total_extra_bytes as usize)
context_before:         assert!(total_extra_bytes <= bpos.to_u32());
context_after:     }