docs: def preview(self, n=10, k='items', kheader='displayLink', klink='link', kdescription='snippet'):
      """Print a preview of the search results.
      
      Args:
        n (int):
          Maximum number of search results to preview
        k (str):
          Key in :class:`api.results`.metadata to preview
        kheader (str):
          Key in :class:`api.results`.metadata[``k``] to use as the header
        klink (str):
          Key in :class:`api.results`.metadata[``k``] to use as the link if image search
        kdescription (str):
          Key in :class:`api.results`.metadata[``k``] to use as the description
      """
      if 'searchType' in self.cseargs:
        searchType = self.cseargs['searchType']
      else:
        searchType = None
      items = self.metadata[k]
    
      # (cse_print) Print results
      for i, kv in enumerate(items[:n]):
        if 'start' in self.cseargs:
          i += int(self.cseargs['start'])
        
        # (print_header) Print result header
        header = '\n[' + str(i) + '] ' + kv[kheader]
        print(header)
        print('=' * len(header))
        
        # (print_image) Print result image file
        if searchType == 'image':
          link = '\n' + path.basename(kv[klink])
          print(link)
          
        # (print_description) Print result snippet
        description = '\n' + kv[kdescription]
        print(description)