syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"Ok(tcx.mk_pat(ty::PatternKind::Range"}]}
source_snippet:                 Ok(tcx.mk_pat(ty::PatternKind::Range { start, end }))
context_before:                 let end = relation.relate(end_a, end_b)?;
context_after:             }