code: def f(x):
      """The function to predict."""
      return x * np.sin(x)
  
imports: import h2o
  from h2o.estimators import H2OGradientBoostingEstimator
  from tests import pyunit_utils
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: f(x) and returns: unknown