syntax_data: {"ast_node_type":"other","tokens":[{"end":22,"kind":"keyword","start":0,"text":"tcx:"}]}
source_snippet:     tcx: TyCtxt<'tcx>,
context_before: struct MakeByMoveBody<'tcx> {
context_after:     field_remapping: UnordMap<FieldIdx, (FieldIdx, Ty<'tcx>, bool, Vec<Projection<'tcx>>)>,