syntax_data: {"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"ConstToPat"}]}
source_snippet:         ConstToPat { tcx: pat_ctxt.tcx, typing_env: pat_ctxt.typing_env, span, id, c }
context_before:         trace!(?pat_ctxt.typeck_results.hir_owner);
context_after:     }