docstr: static cov dataframes must be identical between xarray and TimeSeries
docstr_tok: ["static","cov","dataframes","must","be","identical","between","xarray","and","TimeSeries"]
code: def helper_test_cov_transfer_xa(self, ts, xa_new):
      """static cov dataframes must be identical between xarray and TimeSeries"""
      assert xa_new.attrs[STATIC_COV_TAG].equals(ts.static_covariates)
  
imports: import copy
  import os
  import numpy
  import pandas
  import pytest
  from darts import TimeSeries, concatenate
  from darts.dataprocessing.transformers import BoxCox, Scaler
  from darts.timeseries import DEFAULT_GLOBAL_STATIC_COV_NAME, STATIC_COV_TAG
  from darts.utils.timeseries_generation import generate_index, linear_timeseries
label_desc: Use image node_id 16 for calling the TestTimeSeriesStaticCovariate obj's underlying member method code with example usage: obj.helper_test_cov_transfer_xa(ts, xa_new) without return types