OptionalcontainerThe element the figure is appended to. Defaults to document.body; a page
that wants a landmark around it passes its own <main>.
OptionalconfigureURL of the configuration dialog, relative to the extension's page. When it
is set, the extension's Configure menu opens it; see
configureTableauExtension. Leave it off and the options come from
defaults and whatever was saved already.
OptionalsettingsThe settings key the options are saved under. Defaults to 'maidr'.
OptionaldefaultsOptions that apply when the saved settings leave them out. The saved settings win key by key, so a page can ship sensible defaults and let an author override any of them.
OptionalextensionsThe Extensions API. Defaults to window.tableau.extensions, which the
Extensions library defines; passed in by tests and by pages that load the
library under another name.
Where the extension finds the Extensions library, and how to lay itself out.