import java.nio.ByteOrder;
import java.security.GeneralSecurityException;
import java.security.PublicKey;
import java.security.cert.X509Certificate;
import java.security.interfaces.RSAPublicKey;
<BUG>import java.util.Arrays;
import java.util.Optional;</BUG>
import javax.crypto.Cipher;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;

import java.nio.ByteOrder;
import java.security.GeneralSecurityException;
import java.security.PublicKey;
import java.security.cert.X509Certificate;
import java.security.interfaces.RSAPublicKey;
import java.util.Arrays;
import java.util.List;
import java.util.Optional;
import javax.crypto.Cipher;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
