code: def test_roc_auc_multi(self, n_samples, weighted):
      self.run_roc_auc_multi("hist", n_samples, weighted)
  
imports: import numpy
  import pytest
  import xgboost
  from xgboost import testing
  from xgboost.testing.metrics import check_precision_score, check_quantile_error
label_desc: Use image node_id 11 for calling the TestEvalMetrics obj's underlying member method code with example usage: obj.test_roc_auc_multi(n_samples, weighted) without return types