class_docstr: Similar to TFLiteMetrics but specialized for converter.
  
  A unique session id will be created for each new TFLiteConverterMetrics.
code: def set_export_required(self):
      self._exported = False
  
imports: from typing import Optional, Text
  import uuid
  from tensorflow.lite.python.metrics import converter_error_data_pb2
  from tensorflow.lite.python.metrics import metrics_interface
  from tensorflow.lite.python.metrics.wrapper import metrics_wrapper
  from tensorflow.python.eager import monitoring
label_desc: Use image node_id 3 for calling the TFLiteConverterMetrics obj's underlying member method code with example usage: obj.set_export_required() without return types