{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"//"}]}
                // suggestion more targeted to the `mk_iter(val).next()` case. Maybe do that only to
                // FIXME: We could check that the call's *parent* takes `&mut val` to make the
                // check for whether to suggest `let value` or `let mut value`.