docs: def svs_description_metadata(description):
      """Return metatata from Aperio image description as dict.
  
      The Aperio image description format is unspecified. Expect failures.
  
      >>> svs_description_metadata('Aperio Image Library v1.0')
      {'Aperio Image Library': 'v1.0'}
  
      """
      if not description.startswith('Aperio Image Library '):
          raise ValueError('invalid Aperio image description')
      result = {}
      lines = description.split('\n')
      key, value = lines[0].strip().rsplit(None, 1)  # 'Aperio Image Library'
      result[key.strip()] = value.strip()
      if len(lines) == 1:
          return result
      items = lines[1].split('|')
      result[''] = items[0].strip()  # TODO: parse this?
      for item in items[1:]:
          key, value = item.split(' = ')
          result[key.strip()] = astype(value.strip())
      return result