docs: def add_it(workbench, file_list, labels):
      """Add the given file_list to workbench as samples, also add them as nodes.
  
      Args:
          workbench: Instance of Workbench Client.
          file_list: list of files.
          labels: labels for the nodes.
  
      Returns:
          A list of md5s.
  
      """
      md5s = []
      for filename in file_list:
          if filename != '.DS_Store':
              with open(filename, 'rb') as pe_file:
                  base_name = os.path.basename(filename)
                  md5 = workbench.store_sample(pe_file.read(), base_name, 'exe')
                  workbench.add_node(md5, md5[:6], labels)
                  md5s.append(md5)
      return md5s