Reference schema from other subject during validation

[urmichm]

Similar to issue #426
Can it combine schemas before validating it?
Given plugin 'kafka-schema-registry-maven-plugin'

 <plugin>
                <groupId>io.confluent</groupId>
                <artifactId>kafka-schema-registry-maven-plugin</artifactId>
                <version>7.8.0</version>
                <configuration>
                    <schemaRegistryUrls>
                        <param>${schema.registry.url}</param>
                    </schemaRegistryUrls>
                    <subjects>
                        <order-v1-value>
                            ${schema.path}/Order.avsc
                        </order-v1-value>
                    </subjects>
                </configuration>
                <executions>
                    <execution>
                        <phase>validate</phase>
                        <goals>
                            <goal>test-compatibility</goal>
                        </goals>
                    </execution>
                </executions>
</plugin>

Order and Product are the objects from #426
Schema registry has Order as a stand alone object, therefore Product is inline defined for it.
Could the validator combine the reference objects into inline definitions and then validate it against schema registry?