OptionalboxPosition, dimensions, border, padding, and standard Blessed settings.
OptionalcontentOptional content region settings.
OptionaldataShell layout, state, content, and semantic theme data.
OptionalfooterOptional footer region settings.
OptionalheaderOptional header region settings.
OptionaloverlayOptional overlay region settings.
Blessed screen or node receiving the AppShell root.
OptionalsidebarOptional sidebar region settings.
Options accepted by the Blessed appShell adapter.