fn components_to_show_in_add_menu(
ctx: &ViewContext<'_>,
component_to_vis: &BTreeMap<ComponentName, ViewSystemIdentifier>,
active_defaults: &ComponentNameSet,
) -> Result<Vec<(ComponentName, ViewSystemIdentifier)>, String>fn components_to_show_in_add_menu(
ctx: &ViewContext<'_>,
component_to_vis: &BTreeMap<ComponentName, ViewSystemIdentifier>,
active_defaults: &ComponentNameSet,
) -> Result<Vec<(ComponentName, ViewSystemIdentifier)>, String>