syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"8"}]}
source_snippet:                     8 => fn_abi.ret.cast_to(Reg::i64()),
context_before:                     4 => fn_abi.ret.cast_to(Reg::i32()),
context_after:                     _ => fn_abi.ret.make_indirect(),