code: def extend_label(self, text, label, amt):
      return self.insert_text(text, [label for _ in range(amt)])
  
imports: import unittest
  import pytest
  from finetune.util.metrics import seq_recall, seq_precision, get_seq_count_fn, micro_f1, sequence_f1, sequences_overlap
label_desc: Use image node_id 4 for calling the TestMetrics obj's underlying member method code with example usage: obj.extend_label(text, label, amt) and returns: self