code: def test_runs():
      ary = np.random.random((6, 4))
      checkerboard_plot(
          ary,
          col_labels=["abc", "def", "ghi", "jkl"],
          row_labels=["sample %d" % i for i in range(1, 6)],
          cell_colors=["skyblue", "whitesmoke"],
          font_colors=["black", "black"],
          figsize=(5, 5),
      )
  
imports: import matplotlib.pyplot
  import numpy
  from mlxtend.plotting import checkerboard_plot
label_desc: Use image node_id 1 for calling a global function with example usage: test_runs() without return types