code: def plot_helper(barycenter):
      # plot all points of the data set
      for series in X:
          plt.plot(series.ravel(), "k-", alpha=0.2)
      # plot the given barycenter of them
      plt.plot(barycenter.ravel(), "r-", linewidth=2)
  
imports: import numpy
  import matplotlib.pyplot
  from tslearn.barycenters import euclidean_barycenter, dtw_barycenter_averaging, dtw_barycenter_averaging_subgradient, softdtw_barycenter
  from tslearn.datasets import CachedDatasets
label_desc: Use image node_id 1 for calling a global function with example usage: plot_helper(barycenter) without return types