syntax_data: {"ast_node_type":"other","tokens":[{"end":32,"kind":"keyword","start":0,"text":"Some(s)"}]}
source_snippet:                     Some(s) => {
context_before:                 let msg = match to_pretty_impl_header(tcx, overlap.with_impl) {
context_after:                         format!("conflicting implementation in crate `{cname}`:\n- {s}")