code: def test_regplot_xlim(self):
      f, ax = plt.subplots()
      x, y1, y2 = np.random.randn(3, 50)
      lm.regplot(x=x, y=y1, truncate=False)
      lm.regplot(x=x, y=y2, truncate=False)
      line1, line2 = ax.lines
      assert np.array_equal(line1.get_xdata(), line2.get_xdata())
  
imports: import warnings
  import numpy
  import matplotlib
  import matplotlib.pyplot
  import pandas
  import pytest
  import numpy.testing
  import pandas.testing
  from seaborn import regression
  from seaborn.palettes import color_palette
label_desc: Use image node_id 20 for calling the TestRegressionPlots obj's underlying member method code with example usage: obj.test_regplot_xlim() without return types