public Integer getRpcAdminOffset() {
        if (rpcAdminOffset == null) {
            for (int p = 0; p < getNumPorts(); p++) {
                if (contains(p, "rpc") && contains(p, "admin") && !contains(p, "nc")) {
                    rpcAdminOffset = p;
                    break;
                }
            }
        }
        return rpcAdminOffset;
    }
Get the offset to the rpc port used for admin.

@return the offset, or null if none set
config-model/src/main/java/com/yahoo/vespa/model/PortsMeta.java