code: def write_float(self, datum):
      self.write(STRUCT_FLOAT.pack(datum))
  
imports: import struct
  from avro.io import AvroTypeException, BinaryDecoder, BinaryEncoder, DatumReader, DatumWriter, SchemaResolutionException, Validate
label_desc: Use image node_id 5 for calling the FlinkAvroEncoder obj's underlying member method code with example usage: obj.write_float(datum) without return types