code: def _get_tr_dataset_size_from_z0(z0):
      """Return the training dataset size."""
      return int(np.round(np.exp(z0)))
  
imports: import numpy
  import pickle
  from salsa_estimator import salsa_train_and_validate
label_desc: Use image node_id 1 for calling a global function with example usage: _get_tr_dataset_size_from_z0(z0) and returns: int