code: def branin(x1, x2):
      a = 1.0
      b = 5.1 / (4 * np.pi * np.pi)
      c = 5.0 / np.pi
      r = 6.0
      s = 10.0
      t = 1.0 / (8 * np.pi)
      return (
          a * ((x2 - b * x1 * x1 + c * x1 - r) ** 2)
          + s * (1 - t) * np.cos(x1)
          + s
          + 5 * x1
      )
  
imports: import brainiak.hyperparamopt.hpo
  import numpy
  import scipy.stats
  import matplotlib.pyplot
label_desc: Use image node_id 1 for calling a global function with example usage: branin(x1, x2) and returns: unknown