A tuple containing the plots belonging to a slice.

slice A 2-element tuple representing a slice. The first element is the key of a feature (ex: 'color'), and the second element is the value (ex: 'green'). An empty tuple represents an 'overall' slice (i.e. one that encompasses the entire dataset.
plot A dict mapping output_name and sub_key_id to plot data. The data contains histograms and confusion matrices, which can be rendered with the tfma.view.render_plot function.