code: def test_predict_leaf_basic(self):
      gpu_leaf = run_predict_leaf("gpu:0")
      cpu_leaf = run_predict_leaf("cpu")
      np.testing.assert_equal(gpu_leaf, cpu_leaf)
  
imports: import sys
  from copy import copy
  import numpy
  import pytest
  from hypothesis import assume, given, settings, strategies
  import xgboost
  from xgboost import testing
  from xgboost.compat import PANDAS_INSTALLED
  from test_predict import run_predict_leaf
  from test_predict import run_threaded_predict
label_desc: Use image node_id 13 for calling the TestGPUPredict obj's underlying member method code with example usage: obj.test_predict_leaf_basic() without return types