import org.gradle.internal.serialize.AbstractSerializer;
import org.gradle.internal.serialize.Decoder;
import org.gradle.internal.serialize.Encoder;

import java.io.ByteArrayInputStream;

class PublicKeySerializer extends AbstractSerializer<PGPPublicKey> {

    @Override
    public PGPPublicKey read(Decoder decoder) throws Exception {
        byte[] encoded = decoder.readBinary();

        }
    }

    private static class CacheEntrySerializer extends AbstractSerializer<CacheEntry> {
        private final InterningStringSerializer stringSerializer;
        private final PublicKeySerializer publicKeySerializer = new PublicKeySerializer();

        private CacheEntrySerializer(InterningStringSerializer stringSerializer) {
            this.stringSerializer = stringSerializer;
        }

        @Override

Class <org.gradle.api.internal.artifacts.verification.signatures.PublicKeySerializer> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (PublicKeySerializer.java:0)