SwiftDocCRenderBlockContentRenderBlockContent.HeadingStructureRenderBlockContent.HeadingA heading with the given level.struct HeadingTopicsInitializersinit(level: Int, text: String, anchor: String?)Creates a new heading with the given data.Instance Propertiesvar anchor: String?An optional anchor slug that can be used to link to the heading.var level: IntThe level of the heading.var text: StringThe text in the heading.