syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"tcx.arena.alloc_from_iter(itertools::zip_eq("}]}
source_snippet:             tcx.arena.alloc_from_iter(itertools::zip_eq(
context_before:             let liberated_sig = tcx.liberate_late_bound_regions(def_id.to_def_id(), sig);
context_after:                 liberated_sig.inputs_and_output,