code: def test_checksum_band_window():
      with rasterio.open("tests/data/RGB.byte.tif") as src:
          window = Window(0, 0, src.width, src.height)
          checksums = [
              src.checksum(i, window=window) for i in src.indexes
          ]
          assert checksums == [25420, 29131, 37860]
  
file_path: rasterio/tests/test_checksum.py
imports: import rasterio
  from rasterio.windows import Window
label_desc: Use image node_id 2 for calling a global function with example usage: test_checksum_band_window() without return types