Regarding the graph_objs library, I feel that I’m not understanding the help messages that are provided. For example, the message below, how are these supposed to be read? I still don’t know the type of values that I can use for showlegend, which I presume would be true | false, but even that isn’t put there.
go.Heatmap().help('showlegend') Current path:  Current parent object_names:  With the current parents, 'showlegend' can be used as follows: Under ('figure', 'data', 'heatmap'): description: Determines whether or not an item corresponding to this trace is shown in the legend. editType: style role: info