code: def find_loader(kwargs):
      """
      JSON implementation of data loader which will return a function if any of the
      `click` options based on LOADER_KEY & LOADER_PROPS have been used, otherwise return None
  
      :param kwargs: Optional keyword arguments to be passed from `click`
      :return: data loader function for Parquet implementation
      """
      parquet_opts = get_loader_options(
          LOADER_KEY, LOADER_PROPS, kwargs
      )
      if len([f for f in parquet_opts.values() if f]):
  
          def _parquet_loader():
              parquet_arg_parsers = (
                  {}
              )  # TODO: add additional arg parsers
              kwargs = {
                  k: parquet_arg_parsers.get(k, lambda v: v)(v)
                  for k, v in parquet_opts.items()
              }
              return loader_func(**kwargs)
  
          return _parquet_loader
      return None
  
imports: import pandas
  from dtale.app import show
  from dtale.cli.clickutils import get_loader_options, loader_prop_keys
label_desc: Use image node_id 3 for calling a global function with example usage: find_loader(kwargs) and returns: None, _parquet_loader, loader_func