code: def non_symmetric_matrix():
      """Non symmetric adjacency matrix."""
      return np.array(
          [
              [1.0, -2.0, 0.3, 0.2],
              [0.1, 1, 1.1, 0.1],
              [0.01, 2.3, 1.0, 3.1],
              [0.6, 0.03, 1.2, 1.0],
          ]
      )
  
imports: import os
  import matplotlib.pyplot
  import numpy
  import pytest
  from matplotlib.patches import FancyArrow
  from scipy import sparse
  from nilearn.plotting import plot_connectome
label_desc: Use image node_id 2 for calling a global function with example usage: non_symmetric_matrix() and returns: np