code: def load_default(self):
          
          path = ctypes_util.find_library(self._sdk)
          if path is None:
              # Couldn't find it the standard way.  Fallback to the non-standard
              # way of finding the J-Link library.  These methods are operating
              # system specific.
              if self._windows or self._cygwin:
                  path = next(self.find_library_windows(), None)
              elif sys.platform.startswith('linux'):
                  path = next(self.find_library_linux(), None)
              elif sys.platform.startswith('darwin'):
                  path = next(self.find_library_darwin(), None)
  
          if path is not None:
              return self.load(path)
  
          return False
docs: Loads the default J-Link SDK DLL.
  
          The default J-Link SDK is determined by first checking if ``ctypes``
          can find the DLL, then by searching the platform-specific paths.
  
          Args:
            self (Library): the ``Library`` instance
  
          Returns:
            ``True`` if the DLL was loaded, otherwise ``False``.