code: def test_get_palette():
      # Arrange
      with open("Tests/images/custom_gimp_palette.gpl", "rb") as fp:
          palette_file = GimpPaletteFile(fp)
  
      # Act
      palette, mode = palette_file.getpalette()
  
      # Assert
      assert mode == "RGB"
  
imports: from __future__ import annotations
  import pytest
  from PIL.GimpPaletteFile import GimpPaletteFile
label_desc: Use image node_id 2 for calling a global function with example usage: test_get_palette() without return types