SwiftDocCLineHighlighterLineHighlighter.HighlightStructureLineHighlighter.HighlightA single line’s highlight.struct HighlightTopicsInitializersinit(from: any Decoder) throwsinit(line: Int, start: Int?, length: Int?)Creates a new highlight for a single line.Instance Propertieslet length: Int?If non-nil, the length of the highlight in columns.let line: IntThe line to highlight.let start: Int?If non-nil, the column to start the highlight.