code: def main():
      # bottom to top
      dilated_rates = [1, 2, 3]
      # init feature map
      size = 31
      m = np.zeros(shape=(size, size), dtype=np.int32)
      center = size // 2
      m[center][center] = 1
      # print(m)
      # plot_map(m)
  
      for index, dilated_r in enumerate(dilated_rates[::-1]):
          new_map = dilated_conv_all_map(m, r=dilated_r)
          m = new_map
      print(m)
      plot_map(m)
  
imports: import numpy
  import matplotlib.pyplot
  from matplotlib.colors import LinearSegmentedColormap
label_desc: Use image node_id 4 for calling a global function with example usage: main() without return types