syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"field_remapping:"}]}
source_snippet:     field_remapping: UnordMap<FieldIdx, (FieldIdx, Ty<'tcx>, bool, Vec<Projection<'tcx>>)>,
context_before:     tcx: TyCtxt<'tcx>,
context_after:     by_move_coroutine_ty: Ty<'tcx>,