code: def fall_out(self, idx):
      return self.false_positive_rate(idx)
  
imports: import logging
  from collections import OrderedDict
  import numpy
  from sklearn import metrics
  from sklearn.metrics import confusion_matrix
label_desc: Use image node_id 24 for calling the ConfusionMatrix obj's underlying member method code with example usage: obj.fall_out(idx) and returns: self