code: def branin_function(x, a, b, c, r, s, t):
      """Computes the Branin function."""
      x1 = x[0]
      x2 = x[1]
      neg_ret = float(
          a * (x2 - b * x1**2 + c * x1 - r) ** 2
          + s * (1 - t) * np.cos(x1)
          + s
      )
      return -neg_ret
  
imports: from __future__ import division
  import numpy
  from .general_utils import map_to_cube
  from ..exd.experiment_caller import EuclideanFunctionCaller
label_desc: Use image node_id 6 for calling a global function with example usage: branin_function(x, a, b, c, r, s, t) and returns: unknown