text: #ifndef FILELIB_CHECK_STRUCTURE_H_defined
  #define FILELIB_CHECK_STRUCTURE_H_defined
  
  typedef void (check_structure_t)(void *input);
  
  check_structure_t check_structure_ldm;
  check_structure_t check_structure_obj;
  check_structure_t check_structure_sl;
  
  #endif
  