code: def test_barbs(self):
      plt.rcParams["date.converter"] = "concise"
  
      start_date = datetime.datetime(2022, 2, 8, 22)
      dates = [
          start_date + datetime.timedelta(hours=i) for i in range(12)
      ]
  
      numbers = np.sin(np.linspace(0, 2 * np.pi, 12))
  
      u = np.ones(12) * 10
      v = np.arange(0, 120, 10)
  
      fig, axes = plt.subplots(nrows=1, ncols=2, figsize=(12, 6))
  
      axes[0].barbs(dates, numbers, u, v, length=7)
      axes[0].set_title("Datetime vs. Numeric Data")
      axes[0].set_xlabel("Datetime")
      axes[0].set_ylabel("Numeric Data")
  
      axes[1].barbs(numbers, dates, u, v, length=7)
      axes[1].set_title("Numeric vs. Datetime Data")
      axes[1].set_xlabel("Numeric Data")
      axes[1].set_ylabel("Datetime")
  
imports: import datetime
  import numpy
  import pytest
  import matplotlib.pyplot
  import matplotlib
label_desc: Use image node_id 10 for calling the TestDatetimePlotting obj's underlying member method code with example usage: obj.test_barbs() without return types