code: def hartmann6_4(x):
      """Hartmann function in 3D."""
      alpha = np.array([1.0, 1.2, 3.0, 3.2])
      return hartmann6_4_alpha(x, alpha)
  
imports: import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: hartmann6_4(x) and returns: hartmann6_4_alpha