code: def img_6x6_rgb():
      """
      Generates an RGB image 6x6. It is all 255, besides the edges
  
      Returns
      -------
      out : ndarray
          6x6 uint8 image
      """
      img = gen_gs_img_black_edge(6, 6)
      return np.dstack((img, img, img))
  
file_path: solt/tests/fixtures.py
imports: import pytest
  import numpy
  from .utils import gen_gs_img_black_edge
label_desc: Use image node_id 14 for calling a global function with example usage: img_6x6_rgb() and returns: np