{"ast_node_type":"other","tokens":[{"end":37,"kind":"keyword","start":0,"text":"#[derive(Clone,"}]}
#[derive(Clone, Eq, PartialEq, Hash)]
#[cfg_attr(feature = "nightly", derive(Decodable_NoContext, Encodable_NoContext))]
pub struct BitMatrix<R: Idx, C: Idx> {