code: def _himmelblau(coord):
      """See https://en.wikipedia.org/wiki/Himmelblau%27s_function."""
      x, y = coord[..., 0], coord[..., 1]
      return (x**2 + y - 11) ** 2 + (x + y**2 - 7) ** 2
  
imports: import numpy
  import tensorflow.compat.v2
  import tf_quant_finance
  from tensorflow.python.framework import test_util
label_desc: Use image node_id 3 for calling a global function with example usage: _himmelblau(coord) and returns: unknown