code: def test_raises_find_issues_error_without_valid_inputs(
      self, issue_manager
  ):
      with pytest.raises(ValueError) as e:
          expected_error_msg = (
              "Regression requires numerical `features` or `predictions` "
              "to be passed in as an argument to `find_issues`."
          )
          issue_manager.find_issues()
          assert expected_error_msg in str(e)
  
imports: import numpy
  import pandas
  import pytest
  from cleanlab import Datalab
  from cleanlab.datalab.internal.issue_manager.regression.label import RegressionLabelIssueManager
label_desc: Use image node_id 8 for calling the TestRegressionLabelIssueManager obj's underlying member method code with example usage: obj.test_raises_find_issues_error_without_valid_inputs(issue_manager) without return types