code: def prepare_latents(
      self,
      batch_size,
      num_channels_latents,
      height,
      width,
      dtype,
      device,
      generator,
      latents=None,
  ):
      shape = (
          batch_size,
          num_channels_latents,
          height // self.vae_scale_factor,
          width // self.vae_scale_factor,
      )
      if isinstance(generator, list) and len(generator) != batch_size:
          raise ValueError(
              f"You have passed a list of generators of length {len(generator)}, but requested an effective batch"
              f" size of {batch_size}. Make sure the batch size matches the length of the generators."
          )
  
      if latents is None:
          latents = randn_tensor(
              shape, generator=generator, device=device, dtype=dtype
          )
      else:
          latents = latents.to(device)
  
      # scale the initial noise by the standard deviation required by the scheduler
      latents = latents * self.scheduler.init_noise_sigma
      return latents
  
imports: import inspect
  from typing import Any, Dict, List, Optional, Union
  import torch
  import torch.nn
  from transformers import AutoModel, AutoTokenizer, CLIPImageProcessor
  from diffusers import DiffusionPipeline
  from diffusers.image_processor import VaeImageProcessor
  from diffusers.loaders import LoraLoaderMixin
  from diffusers.models import AutoencoderKL, UNet2DConditionModel
  from diffusers.models.lora import adjust_lora_scale_text_encoder
  from diffusers.pipelines.stable_diffusion.pipeline_output import StableDiffusionPipelineOutput
  from diffusers.pipelines.stable_diffusion.safety_checker import StableDiffusionSafetyChecker
  from diffusers.schedulers import KarrasDiffusionSchedulers
  from diffusers.utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
  from diffusers.utils.torch_utils import randn_tensor
label_desc: Use image node_id 12 for calling the GlueGenStableDiffusionPipeline obj's underlying member method code with example usage: obj.prepare_latents(batch_size, num_channels_latents, height, width, dtype, device, generator, latents) and returns: latents