}
  }

  override fun equals(other: Any?): Boolean =
    other is AndroidCertificateChainCleaner &&
      other.trustManager === this.trustManager

  override fun hashCode(): Int = System.identityHashCode(trustManager)

  companion object {
    @SuppressSignatureCheck
    fun buildIfSupported(trustManager: X509TrustManager): AndroidCertificateChainCleaner? {
      val extensions =
        try {

import javax.net.ssl.X509TrustManager
import okhttp3.Protocol
import okhttp3.internal.SuppressSignatureCheck
import okhttp3.internal.platform.android.Android10SocketAdapter
import okhttp3.internal.platform.android.AndroidCertificateChainCleaner
import okhttp3.internal.platform.android.AndroidSocketAdapter
import okhttp3.internal.platform.android.BouncyCastleSocketAdapter
import okhttp3.internal.platform.android.ConscryptSocketAdapter

import javax.net.ssl.SSLSocket
import javax.net.ssl.SSLSocketFactory
import javax.net.ssl.X509TrustManager
import okhttp3.Protocol
import okhttp3.internal.SuppressSignatureCheck
import okhttp3.internal.platform.android.AndroidCertificateChainCleaner
import okhttp3.internal.platform.android.AndroidSocketAdapter
import okhttp3.internal.platform.android.BouncyCastleSocketAdapter
import okhttp3.internal.platform.android.ConscryptSocketAdapter

 * chain. This class duplicates the clean chain building performed during the TLS handshake. We
 * prefer other mechanisms where they exist, such as with
 * [okhttp3.internal.platform.AndroidPlatform.AndroidCertificateChainCleaner].
 *
 * This class includes code from [Conscrypt's][Conscrypt] [TrustManagerImpl] and
 * [TrustedCertificateIndex].
 *
 * [Conscrypt]: https://conscrypt.org/
 */
class BasicCertificateChainCleaner(