code: def from_preset(preset):
          
          if preset == 'vesta_2019':
              cut_offs = loadfn(os.path.join(_directory, 'vesta_cutoffs.yaml'))
              return CutOffDictNN(cut_off_dict=cut_offs)
          else:
              raise ValueError("Unrecognised preset: {}".format(preset))
docs: Initialise a CutOffDictNN according to a preset set of cut-offs.
  
          Args:
              preset (str): A preset name. The list of supported presets are:
  
                  - "vesta_2019": The distance cut-offs used by the VESTA
                    visualisation program.
  
          Returns:
              A CutOffDictNN using the preset cut-off dictionary.