Attribute "required" on key-store makes no difference of behaviour

"required" => {
    "type" => BOOLEAN,
    "description" => "Is the file required to exist at the time the KeyStore service starts?",
    "attribute-group" => "file",
    "expressions-allowed" => true,
    "nillable" => true,
    "default" => false,
    "requires" => ["path"],
    "access-type" => "read-write",
    "storage" => "configuration",
    "restart-required" => "resource-services"
},

[standalone@localhost:9990 /] /subsystem=elytron/key-store=server:add(type="jks", path="/path/non-existing", required=false)
{
    "outcome" => "failed",
    "failure-description" => {
        "WFLYCTL0080: Failed services" => {"org.wildfly.security.key-store.server" => "org.jboss.msc.service.StartException in service org.wildfly.security.key-store.server: WFLYELY00004: Unable to start the service.
    Caused by: java.io.FileNotFoundException: /path/non-existing (No such file or directory)"},
        "WFLYCTL0412: Required services that are not installed:" => ["org.wildfly.security.key-store.server"],
        "WFLYCTL0180: Services with missing/unavailable dependencies" => undefined
    },
    "rolled-back" => true
}
[standalone@localhost:9990 /] /subsystem=elytron/key-store=server:add(type="jks", path="/path/non-existing", required=true)
{
    "outcome" => "failed",
    "failure-description" => {
        "WFLYCTL0080: Failed services" => {"org.wildfly.security.key-store.server" => "org.jboss.msc.service.StartException in service org.wildfly.security.key-store.server: WFLYELY00004: Unable to start the service.
    Caused by: java.io.FileNotFoundException: /path/non-existing (No such file or directory)"},
        "WFLYCTL0412: Required services that are not installed:" => ["org.wildfly.security.key-store.server"],
        "WFLYCTL0180: Services with missing/unavailable dependencies" => undefined
    },
    "rolled-back" => true
}