Importing a non-existing VDB gives no warning

When importing a "non-existing VDB" in a VDB, when the VDB is deployed, the VDB status is LOADING, and nothing else happens.

Ideally a warning should be thrown in logs.

Ex:

<code>
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<vdb name="ReferenceDataVDB" version="1">
<description>ReferenceData VDB</description>

<import-vdb name="NonExistingVDB" version="1"/>

<model name="ReferenceData" type="VIRTUAL">
.....

</code>
Logs:

<panel>
12:56:11,529 INFO [org.jboss.as.server.deployment] (MSC service thread 1-2) WFLYSRV0027: Starting deployment of "ReferenceData-vdb.xml" (runtime-name: "ReferenceData-vdb.xml")
12:56:11,953 INFO [org.jboss.as.server] (DeploymentScanner-threads - 1) WFLYSRV0010: Deployed "ReferenceData-vdb.xml" (runtime-name : "ReferenceData-vdb.xml")
</panel>