code: def _open_geotiff(file_path):
      with open(file_path, "rb") as file_obj:
          with rasterio.open(file_obj) as dataset:
              dataset.read()
  
imports: from io import BytesIO
  import logging
  import os.path
  import pytest
  import rasterio
  from rasterio.enums import MaskFlags
  from rasterio.shutil import copyfiles
  from rasterio.windows import Window
  import io
label_desc: Use image node_id 18 for calling a global function with example usage: _open_geotiff(file_path) without return types