code: def features(self):
      # 1 feature, 7 points
      return np.array([0.1, 0.2, 0.3, 0.35, 0.4, 0.45, 0.5]).reshape(
          -1, 1
      )
  
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 2 for calling the TestRegressionLabelIssueManager obj's underlying member method code with example usage: obj.features() and returns: np