code: def _try_import():
      # since pandas is a dependency of pandas-gbq
      # we need to import on first use
      try:
          import pandas_gbq
      except ImportError:
          # give a nice error message
          raise ImportError(
              "Load data from Google BigQuery\n"
              "\n"
              "the pandas-gbq package is not installed\n"
              "see the docs: https://pandas-gbq.readthedocs.io\n"
              "\n"
              "you can install via pip or conda:\n"
              "pip install pandas-gbq\n"
              "conda install pandas-gbq -c conda-forge\n"
          )
  
      return pandas_gbq
  
imports: import warnings
label_desc: Use image node_id 1 for calling a global function with example usage: _try_import() and returns: pandas_gbq