text: #ifndef __LUKE_IMPL_H__
  #define __LUKE_IMPL_H__
  
  // add linkerage
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  void c_luke_impl(uint8_t *keys, uint8_t *data, uint8_t *dataOut);
  
  #ifdef __cplusplus
  }
  #endif
  
  
  #endif /* __LUKE_IMPL_H__ */