code: def is_url(checkpoint):
      """Check whether the checkpoint is a url or not."""
      is_url = "https://storage.googleapis.com" in checkpoint
      return is_url
  
imports: import os
  import hydra
  import torch
  from hydra import utils
  from torch import nn
  from lightly.cli._cli_simclr import _SimCLR
  from lightly.embedding import SelfSupervisedEmbedding
  from lightly.models import ZOO
  from lightly.models import ResNetGenerator
  from lightly.models.batchnorm import get_norm_layer
  from lightly.utils.version_compare import version_compare
label_desc: Use image node_id 4 for calling a global function with example usage: is_url(checkpoint) and returns: is_url