code: def stat_fun(x):
      """Return sum of squares."""
      return np.sum(x**2, axis=0)
  
imports: import matplotlib.pyplot
  import numpy
  import mne
  from mne.baseline import rescale
  from mne.datasets import somato
  from mne.stats import bootstrap_confidence_interval
label_desc: Use image node_id 1 for calling a global function with example usage: stat_fun(x) and returns: np