{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"mir::CastKind::PointerCoercion(PointerCoercion::Unsize,"}]}
                mir::CastKind::PointerCoercion(PointerCoercion::Unsize, _),
            mir::Rvalue::Cast(
                ref operand,