syntax_data: {"ast_node_type":"other","tokens":[{"end":13,"kind":"keyword","start":0,"text":"}"}]}
source_snippet:             }
context_before:                 conflicts_move.push(Conflict::Moved { span, name }) // `ref mut?` + by-move conflict.
context_after:             ByRef::No => {} // `ref mut?` + by-copy is fine.