code: def reindex(cls, dataset, kdims=None, vdims=None):
      dropped_kdims = [kd for kd in dataset.kdims if kd not in kdims]
      constant = {}
      for kd in dropped_kdims:
          vals = cls.values(dataset, kd.name, expanded=False)
          if len(vals) == 1:
              constant[kd.name] = vals[0]
      if len(constant) == len(dropped_kdims):
          dropped = dataset.data.sel(
              **{
                  k: v
                  for k, v in constant.items()
                  if k in dataset.data.dims
              }
          )
          if vdims and cls.packed(dataset):
              return dropped.isel(
                  **{
                      dataset.data.dims[-1]: [
                          dataset.vdims.index(vd) for vd in vdims
                      ]
                  }
              )
          return dropped
      elif dropped_kdims:
          return tuple(dataset.columns(kdims + vdims).values())
      return dataset.data
  
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 20 for calling the XArrayInterface obj's underlying member method code with example usage: obj.reindex(cls, dataset, kdims, vdims) and returns: dataset, dropped, dropped, tuple