syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"Rvalue::Ref(re_erased,"}]}
source_snippet:                     Rvalue::Ref(re_erased, util::ref_pat_borrow_kind(mutbl), binding.source)
context_before:                 ByRef::Yes(mutbl) => {
context_after:                 }