div { var v0_opt: [HTML]? if useChapterTitles { let v0: [HTML] = HTMLBuilder.buildExpression(h1(chapter + "1. Loomings.")) v0_opt = v0 } let v0_result = HTMLBuilder.buildOptional(v0_opt) let v1 = HTMLBuilder.buildExpression(p { "Call me Ishmael. Some years ago" }) let v2 = HTMLBuilder.buildExpression(p { "There is now your insular city" }) return HTMLBuilder.buildBlock(v0_result, v1, v2) }