code: def is_vb(self):
      return self == LossType.KL or self == LossType.RESCALED_KL
  
imports: import enum
  import math
  import numpy
  import torch
  import torch
  from tqdm import tqdm
  from TTS.tts.layers.tortoise.dpm_solver import DPM_Solver, NoiseScheduleVP, model_wrapper
label_desc: Use image node_id 1 for calling the LossType obj's underlying member method code with example usage: obj.is_vb() and returns: unknown