code: def read(self, n=1):
      return self._stream.read(n)
  
imports: import struct
  from avro.io import AvroTypeException, BinaryDecoder, BinaryEncoder, DatumReader, DatumWriter, SchemaResolutionException, Validate
label_desc: Use image node_id 3 for calling the FlinkAvroBufferWrapper obj's underlying member method code with example usage: obj.read(n) and returns: self