code: def write_bytes(self, datum):
      self.write_int(len(datum))
      self.write(datum)
  
imports: import struct
  from avro.io import AvroTypeException, BinaryDecoder, BinaryEncoder, DatumReader, DatumWriter, SchemaResolutionException, Validate
label_desc: Use image node_id 7 for calling the FlinkAvroEncoder obj's underlying member method code with example usage: obj.write_bytes(datum) without return types