CasC globalLibraries Demonstrating weird warning message

pom.xml

@@ -221,5 +221,10 @@
             <version>1.10.10</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>io.jenkins.configuration-as-code</groupId>
+            <artifactId>test-harness</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 </project>

src/test/java/org/jenkinsci/plugins/workflow/libs/JCasCGlobalLibrariesTest.java

@@ -0,0 +1,35 @@
+package org.jenkinsci.plugins.workflow.libs;
+
+import io.jenkins.plugins.casc.misc.ConfiguredWithCode;
+import io.jenkins.plugins.casc.misc.JenkinsConfiguredWithCodeRule;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.RuleChain;
+import org.jvnet.hudson.test.LoggerRule;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.collection.IsIn.in;
+import static org.hamcrest.core.IsNot.not;
+
+public class JCasCGlobalLibrariesTest {
+
+    public JenkinsConfiguredWithCodeRule j = new JenkinsConfiguredWithCodeRule();
+    public LoggerRule logging = new LoggerRule();
+
+    @Rule
+    public RuleChain chain = RuleChain.outerRule(logging.record(Logger.getLogger("io.jenkins.plugins.casc.BaseConfigurator"), Level.INFO)
+                    .capture(2048))
+            .around(j);
+
+    @Test
+    @ConfiguredWithCode("JCasCGlobalLibrariesTest.yml")
+    public void isBaseConfiguratorComplainingAboutOwner() {
+        //WARNING i.j.p.casc.BaseConfigurator#createAttribute: Can't handle class jenkins.plugins.git.GitSCMSource#owner: type is abstract but not Describable.
+        assertThat("Can't handle class jenkins.plugins.git.GitSCMSource#owner: type is abstract but not Describable.",
+                not(in(logging.getMessages())
+        ));
+    }
+}

src/test/resources/JCasCGlobalLibrariesTest.yml

@@ -0,0 +1,15 @@
+unclassified:
+  globalLibraries:
+    libraries:
+      - defaultVersion: "dev"
+        includeInChangesets: false
+        name: "cloudbees-shared-library"
+        retriever:
+          modernSCM:
+            clone: true
+            scm:
+              git:
+                credentialsId:
+                remote:
+                traits:
+                  - "gitBranchDiscovery"