code: def im_mask():
      """Create image mask"""
      arr = np.array([[0, 0, 1], [1, 2, 2]])
      return arr
  
file_path: earthpy/earthpy/tests/test_mask.py
imports: import numpy
  from earthpy.mask import mask_pixels
  import pytest
label_desc: Use image node_id 2 for calling a global function with example usage: im_mask() and returns: arr