support recursive variable substitution in properties?

[Andrei Pozolotin]

    *Hi*

    the following does not work, when placed in custom.properties:

    org.osgi.framework.system.packages.extra =
    org.apache.karaf.branding; ${org.osgi.framework.system.packages.extra}

    I am curious if karaf should support recursive variable substitution?

    Thank you,

    Andrei