code: def total_positives_test(
      test=None, reference=None, confusion_matrix=None, **kwargs
  ):
      if confusion_matrix is None:
          confusion_matrix = ConfusionMatrix(test, reference)
  
      tp, fp, tn, fn = confusion_matrix.get_matrix()
      return tp + fp
  
imports: import numpy
  from medpy import metric
label_desc: Use image node_id 16 for calling a global function with example usage: total_positives_test(test, reference, confusion_matrix) and returns: unknown