code: def exists(val):
      return val is not None
  
file_path: TTS/TTS/tts/layers/tortoise/clvp.py
imports: import torch
  import torch.nn
  import torch.nn.functional
  from torch import einsum
  from TTS.tts.layers.tortoise.arch_utils import CheckpointedXTransformerEncoder
  from TTS.tts.layers.tortoise.transformer import Transformer
  from TTS.tts.layers.tortoise.xtransformers import Encoder
label_desc: Use image node_id 1 for calling a global function with example usage: exists(val) and returns: unknown