@Override
    public boolean equals(Object o) {
        if (!(o instanceof AccessControlEntryFilter))
            return false;
        AccessControlEntryFilter other = (AccessControlEntryFilter) o;
        return data.equals(other.data);
    }
Returns a string describing an ANY or UNKNOWN field, or null if there is
no such field.
clients/src/main/java/org/apache/kafka/common/acl/AccessControlEntryFilter.java