new_contents: from wandb.data_types import Table
  from wandb.core import Error
  
  class Visualize:
      def __init__(self, viz_id, value):
          self.viz_id = viz_id
          self.value = value
  
  def visualize(viz_id, value):
      if not isinstance(value, Table):
          raise Error("visualize value must be Table, not {}".format(type(value).__name__))
      return Visualize(viz_id, value)
  
subject: add missing file