public boolean contains(int offset, String meta) {
        return offset < ports.size() && ports.get(offset).contains(meta);
    }
Check if the port at a specific offset contains a particular meta attribute.

@param offset the relative port offset
@param meta the meta info we want to check for
@return boolean true if the specific port has registered the meta
config-model/src/main/java/com/yahoo/vespa/model/PortsMeta.java