Kubernetes Java client bug 1978

JavaClientBug1978.java

import io.kubernetes.client.openapi.models.V1CustomResourceValidation;
import io.kubernetes.client.openapi.models.V1CustomResourceValidationBuilder;
import io.kubernetes.client.openapi.models.V1JSONSchemaPropsBuilder;

public class JavaClientBug1978 {
    public static void main(String... args) {
        V1CustomResourceValidation crdValidation = new V1CustomResourceValidationBuilder()
                .withOpenAPIV3Schema(new V1JSONSchemaPropsBuilder()
                        .withType("object")
                        // Does not exist:
                        //.withXKubernetesPreserveUnknwonFields(true)
                        .build()
                        // Doesn't work because `withOpenAPIV3Schema` doesn't copy the field:
                        .xKubernetesPreserveUnknownFields(true))
                .build();

        // Only this workaround helps:
        //crdValidation.getOpenAPIV3Schema().setxKubernetesPreserveUnknownFields(true);

        // Should print `true` but prints `null` (except if you uncomment the workaround above):
        System.out.println(crdValidation.getOpenAPIV3Schema().getxKubernetesPreserveUnknownFields());
    }
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>k8s-java-client-bug-1978</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <dependencies>
        <dependency>
            <groupId>io.kubernetes</groupId>
            <artifactId>client-java-api</artifactId>
            <version>14.0.0</version>
        </dependency>
        <dependency>
            <groupId>io.kubernetes</groupId>
            <artifactId>client-java-api-fluent</artifactId>
            <version>14.0.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                        <configuration>
                            <archive>
                                <manifest>
                                    <mainClass>JavaClientBug1978</mainClass>
                                </manifest>
                            </archive>
                            <descriptorRefs>
                                <descriptorRef>jar-with-dependencies</descriptorRef>
                            </descriptorRefs>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>