whenceOutput            An output that explains where its number came
                        from
whencePlotOutput        A plot whose bars and points explain where they
                        came from
whenceTableOutput       A summary table whose rows explain where they
                        came from
whence_group            Explain one row of a summary table
whence_opened           The panel that the viewer has open
whence_rows             The rows that make the value, or the rows that
                        a step removed
whence_table            Trace where the rows of a summary table came
                        from
whence_trace            Trace where a number came from
whence_value            Parts of a trace
