code: def main():
      fig = plt.figure(figsize=(10, 5))
      ax = fig.add_subplot(1, 1, 1, projection=ccrs.PlateCarree())
      ax.set_extent([-90, 75, 10, 85], crs=ccrs.PlateCarree())
      ax.coastlines()
  
      x, y, u, v, vector_crs = sample_data(shape=(80, 100))
      magnitude = (u**2 + v**2) ** 0.5
      ax.streamplot(
          x,
          y,
          u,
          v,
          transform=vector_crs,
          linewidth=2,
          density=2,
          color=magnitude,
      )
      plt.show()
  
imports: import matplotlib.pyplot
  import cartopy.crs
label_desc: Use image node_id 2 for calling a global function with example usage: main() without return types