syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                 if !seen_projection_preds.insert(tcx.anonymize_bound_vars(projection_pred)) {
context_before:                 let projection_pred = clause.kind().rebind(projection_pred);
context_after:                     continue;