code: def regression_lab(self, features):
      y = ground_truth_target_function(features)
      # Flip the sign of the point x=0.4
      y[features == 0.4] *= -1
      y = y.ravel()
      return Datalab({"y": y}, label_name="y", task="regression")
  
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 3 for calling the TestRegressionLabelIssueManager obj's underlying member method code with example usage: obj.regression_lab(features) and returns: Datalab