syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"func:"}]}
source_snippet:                 func: pin_fut_new_unchecked_fn,
context_before:             kind: TerminatorKind::Call {
context_after:                 args: [dummy_spanned(Operand::Move(fut_ref_place))].into(),