Method resolveWith

packages/tailwindcss/src/theme.ts:245–274

(
    candidateValue: string,
    themeKeys: ThemeKey[],
    nestedKeys: `--${string}`[] = [],
  )

  }

  resolveWith(
    candidateValue: string,
    themeKeys: ThemeKey[],
    nestedKeys: `--${string}`[] = [],
  ): [string, Record<string, string>] | null {
    let themeKey = this.#resolveKey(candidateValue, themeKeys)

    if (!themeKey) return null

    let extra = {} as Record<string, string>
    for (let name of nestedKeys) {
      let nestedKey = `${themeKey}${name}`
      let nestedValue = this.values.get(nestedKey)!
      if (!nestedValue) continue

      if (nestedValue.options & ThemeOptions.INLINE) {
        extra[name] = nestedValue.value
      } else {
        extra[name] = this.#var(nestedKey)!
      }
    }

    let value = this.values.get(themeKey)!

    if (value.options & ThemeOptions.INLINE) {
      return [value.value, extra]
    }

    return [this.#var(themeKey)!, extra]
  }

  namespace(namespace: string) {
    let values = new Map<string | null, string>()