code: def abs_energy(signal):
      """Computes the absolute energy of the signal.
  
      Feature computational cost: 1
  
      Parameters
      ----------
      signal : nd-array
          Input from which the area under the curve is computed
  
      Returns
      -------
      float
          Absolute energy
  
      """
      return np.sum(np.abs(signal) ** 2)
  
imports: import scipy.signal
  from tsfel.feature_extraction.features_utils import *
label_desc: Use image node_id 15 for calling a global function with example usage: abs_energy(signal) and returns: np