) : TrustRootIndex {
  private val subjectToCaCerts: Map<X500Principal, Set<X509Certificate>>

  init {
    val map = mutableMapOf<X500Principal, MutableSet<X509Certificate>>()
    for (caCert in caCerts) {
      map.getOrPut(caCert.subjectX500Principal) { mutableSetOf() }.add(caCert)
    }
    this.subjectToCaCerts = map
  }

  override fun findByIssuerAndSignature(cert: X509Certificate): X509Certificate? {

  for (mapping in mappings) {
    require(!mapping.spansSections)

    val section = mapping.section
    val rangeStart = mapping.rangeStart

    val sectionList = result.getOrPut(section) { mutableListOf() }

    sectionList +=
      when (mapping.type) {
        TYPE_MAPPED ->
          run {
            val deltaMapping = inlineDeltaOrNull(mapping)