Tailwind CSS 소스 코드의 buildDesignSystem fn

export type DesignSystem = {
  theme: Theme
  utilities: Utilities
  variants: Variants

  invalidCandidates: Set<string>

  // Whether to mark utility declarations as !important
  important: boolean

  getClassOrder(classes: string[]): [string, bigint | null][]
  getClassList(): ClassEntry[]
  getVariants(): VariantEntry[]

  parseCandidate(candidate: string): Candidate[]
  parseVariant(variant: string): Variant | null
  compileAstNodes(candidate: Candidate): ReturnType<typeof compileAstNodes>

  getVariantOrder(): Map<Variant, number>
  resolveThemeValue(path: string): string | undefined

  // Used by IntelliSense
  candidatesToCss(classes: string[]): (string | null)[]
}

let parsedVariants = new DefaultMap((variant) => parseVariant(variant, designSystem))
let parsedCandidates = new DefaultMap((candidate) =>
  Array.from(parseCandidate(candidate, designSystem)),
)
let compiledAstNodes = new DefaultMap<Candidate>((candidate) =>
  compileAstNodes(candidate, designSystem),
)

parseCandidate(candidate: string) {
  return parsedCandidates.get(candidate)
},
parseVariant(variant: string) {
  return parsedVariants.get(variant)
},
compileAstNodes(candidate: Candidate) {
  return compiledAstNodes.get(candidate)
},