code: def sort(cls, dataset, by=None, reverse=False):
      if by is None:
          by = []
      return dataset
  
imports: import sys
  import types
  import numpy
  import pandas
  from ..None import util
  from ..dimension import Dimension, asdim, dimension_name
  from ..element import Element
  from ..ndmapping import NdMapping, item_check, sorted_context
  from .grid import GridInterface
  from .interface import DataError, Interface
  from .util import dask_array_module, finite_range
label_desc: Use image node_id 21 for calling the XArrayInterface obj's underlying member method code with example usage: obj.sort(cls, dataset, by, reverse) and returns: dataset