code: def read_message(self):
      try:
          message_type = self.read_byte()
      except PostgresEmptyDataException:
          self.logger.warn("Postgres Proxy: Received empty data string")
          return None
      try:
          message_type = PostgresFrontendMessageIdentifier(message_type)
      except Exception as e:
          raise UnsupportedPostgresMessageType(
              "%s is not a supported frontend message identifier:\n%s"
              % (message_type, str(e))
          )
  
      if message_type in self.fe_message_map:
          self.logger.debug(
              "reading message type %s" % str(message_type.name)
          )
          return self.fe_message_map[message_type]().read(self)
      else:
          raise UnsupportedPostgresMessageType(
              "%s is not a supported frontend message identifier"
              % message_type.value
          )
  
imports: import struct
  from typing import List, Any, BinaryIO, Sequence, Dict
  from mindsdb.api.postgres.postgres_proxy.utilities import strip_null_byte
  from mindsdb.utilities import log
  import time
  from mindsdb.api.postgres.postgres_proxy.postgres_packets.postgres_fields import PostgresField
  from mindsdb.api.postgres.postgres_proxy.postgres_packets.postgres_message_identifiers import PostgresBackendMessageIdentifier, PostgresFrontendMessageIdentifier, PostgresAuthType
label_desc: Use image node_id 12 for calling the PostgresPacketReader obj's underlying member method code with example usage: obj.read_message() and returns: self, None