code: def _get_dataset_metadata(dataset):
      """Implement this function to perform metadata reporting for a dataset
  
      This implementation reports no metadata.
  
      Returns
      -------
      dict
          Can contain keys like 'description', 'shortdescription', 'author',
          'homepage', 'citation', 'license', 'tag', 'fundedby'
      """
  
      meta = {}
      if hasattr(dataset, "metadata"):
          dsinfo = dataset.metadata(
              ".",
              reporton="datasets",
              return_type="item-or-list",
              result_renderer="disabled",
              on_failure="ignore",
          )
          if (
              not isinstance(dsinfo, dict)
              or dsinfo.get("status", None) != "ok"
          ):
              lgr.warning(
                  "Could not obtain dataset metadata, proceeding without"
              )
          else:
              # flatten possibly existing multiple metadata sources
              for src in dsinfo["metadata"]:
                  if src.startswith("@"):
                      # not a source
                      continue
                  meta.update(dsinfo["metadata"][src])
      return meta
  
imports: import logging
  from datalad.interface.base import Interface
  from datalad.interface.base import build_doc
  from datalad.support.annexrepo import AnnexRepo
label_desc: Use image node_id 1 for calling a global function with example usage: _get_dataset_metadata(dataset) and returns: meta