SwiftDocCRenderHierarchyTutorialStructureRenderHierarchyTutorialA hierarchy tree node that represents a tutorial or a tutorial article.struct RenderHierarchyTutorialTopicsInitializersinit(from: any Decoder) throwsinit(identifier: RenderReferenceIdentifier)Creates a new tutorial or tutorial article.Instance Propertiesvar landmarks: [RenderHierarchyLandmark]The landmarks on the page.var reference: RenderReferenceIdentifierThe topic reference.