code: def setUp(self):
      try:
          import xarray as xr
          import pandas as pd  # noqa
      except:
          raise SkipTest("xarray or pandas not available")
      self.default_kwargs = {
          "value_label": "value",
          "label": None,
          "gridded": False,
          "persist": False,
          "use_dask": False,
          "groupby": None,
          "y": None,
          "x": None,
          "by": None,
          "other_dims": [],
      }
      self.ds = xr.tutorial.open_dataset("air_temperature")
  
imports: import numpy
  import pandas
  import pytest
  from unittest import TestCase, SkipTest
  from hvplot.util import check_crs, is_list_like, process_crs, process_xarray, _convert_col_names_to_str, instantiate_crs_str
label_desc: Use image node_id 1 for calling the TestProcessXarray obj's underlying member method code with example usage: obj.setUp() without return types