{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"///"}]}
/// action that is convertible into an UndoLog (per the From impls above).
/// The UndoLogs trait defines how we undo a particular kind of action (of type T). We can undo any
impl<'tcx, T> UndoLogs<T> for InferCtxtUndoLogs<'tcx>