publishing {
    publications {
        create<MavenPublication>("maven") {
            artifactId = moduleIdentity.baseName.get()

            from(components["gradleApi"])

            versionMapping {
                allVariants {
                    fromResolutionOf(configurations.externalRuntimeClasspath.get())
                }
            }

            pom {

Class <org.gradle.api.publish.ivy.internal.publisher.ValidatingIvyPublisher> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (ValidatingIvyPublisher.java:0)
Class <org.gradle.api.publish.ivy.internal.versionmapping.DefaultVersionMappingStrategy> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (DefaultVersionMappingStrategy.java:0)