code: def test_pr_auc_multi(self):
      self.run_pr_auc_multi("hist")
  
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 15 for calling the TestEvalMetrics obj's underlying member method code with example usage: obj.test_pr_auc_multi() without return types