import org.gradle.internal.resource.transfer.ExternalResourceLister;

import java.util.List;

public class HttpResourceLister implements ExternalResourceLister {
    private final HttpResourceAccessor accessor;

    public HttpResourceLister(HttpResourceAccessor accessor) {
        this.accessor = accessor;
    }

    @Override

import spock.lang.Specification

class HttpResourceListerTest extends Specification {
    HttpResourceAccessor accessorMock = Mock()
    ExternalResourceMetaData metaData = Mock()
    HttpResourceLister lister = new HttpResourceLister(accessorMock)

    def "parses resource content"() {
        setup:
        def inputStream = new ByteArrayInputStream("<a href='child'/>".bytes)

            .withRedirectVerifier(connectionDetails.getRedirectVerifier())
            .build()
        );
        HttpResourceAccessor accessor = new HttpResourceAccessor(http);
        HttpResourceLister lister = new HttpResourceLister(accessor);
        HttpResourceUploader uploader = new HttpResourceUploader(http);
        return new DefaultExternalResourceConnector(accessor, lister, uploader);
    }

Class <org.gradle.internal.resource.transport.http.HttpResourceLister> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (HttpResourceLister.java:0)