code: def _check_metadata(
      self, gdf, geometry_column_name="geometry", crs=None
  ):
      assert gdf._geometry_column_name == geometry_column_name
      assert gdf.crs == crs
  
file_path: geopandas/geopandas/tests/test_merge.py
imports: import warnings
  import pandas
  import pyproj
  import pytest
  from geopandas._compat import PANDAS_GE_21
  from geopandas.testing import assert_geodataframe_equal
  from pandas.testing import assert_index_equal
  from shapely.geometry import Point
  from geopandas import GeoDataFrame, GeoSeries
label_desc: Use image node_id 2 for calling the TestMerging obj's underlying member method code with example usage: obj._check_metadata(gdf, geometry_column_name, crs) without return types