clone method

Implementation

@override
Axi4WriteCluster clone() => Axi4WriteCluster(
      idWidth: awIntf.idWidth,
      addrWidth: awIntf.addrWidth,
      lenWidth: awIntf.lenWidth,
      userWidth: awIntf.userWidth,
      useLast: wIntf.useLast,
      useLock: awIntf.useLock,
      dataWidth: wIntf.dataWidth,
    );