code: def load_fitsbuf(self, imname, fitsbuf, num_hdu):
          
          load_fits_buffer = self._client_.lookup_attr('load_fits_buffer')
  
          return load_fits_buffer(imname, self._chname,
                                  Blob(fitsbuf),
                                  num_hdu, {})
docs: Display a FITS file buffer in a remote Ginga reference viewer.
  
          Parameters
          ----------
          imname : str
              A name to use for the image in the reference viewer.
  
          chname : str
              Name of a channel in which to load the image.
  
          fitsbuf : str
              This should be a valid FITS file, read in as a complete buffer.
  
          num_hdu : int or 2-tuple
              Number or key of the HDU to open from the buffer.
  
          Returns
          -------
          0
  
          Notes
          -----
          * The "RC" plugin needs to be started in the viewer for this to work.