code: def main():
      fig = plt.figure()
      ax = fig.add_axes([0, 0, 1, 1], projection=ccrs.PlateCarree())
      ax.coastlines()
  
      # Construct a star in longitudes and latitudes.
      star_path = mpath.Path.unit_regular_star(5, 0.5)
      star_path = mpath.Path(
          star_path.vertices.copy() * 80, star_path.codes.copy()
      )
  
      # Use the star as the boundary.
      ax.set_boundary(star_path, transform=ccrs.PlateCarree())
  
      plt.show()
  
imports: import matplotlib.path
  import matplotlib.pyplot
  import cartopy.crs
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types