SwiftDocCRenderBlockContentRenderBlockContent.RowStructureRenderBlockContent.RowA row in a grid-based layout system that describes a collection of columns.struct RowTopicsStructuresstruct ColumnA column with a row in a grid-based layout system.Initializersinit(from: any Decoder) throwsInstance Propertiesvar columns: [RenderBlockContent.Row.Column]The columns that should be rendered in this row.var numberOfColumns: IntThe number of columns that should be rendered in this row.