this.presentFeatures = copyToSet(presentFeatures);
    this.absentFeatures = copyToSet(absentFeatures);
  }

  public TesterRequirements(TesterRequirements tr) {
    this(tr.getPresentFeatures(), tr.getAbsentFeatures());
  }

  public TesterRequirements() {
    this(Collections.<Feature<?>>emptySet(), Collections.<Feature<?>>emptySet());
  }

                                            <thead>
                                            <tr>
                                                <th><la:message
                                                        key="labels.bad_word_list_suggest_word"/></th>
                                            </tr>
                                            </thead>
                                            <tbody>

                                    <tr>
                                        <th style="width: 25%"><la:message
                                                key="labels.dict_mapping_source"/></th>
                                        <td>${f:br(f:h(inputs))}<la:hidden property="inputs"/></td>
                                    </tr>
                                    <tr>

                                    <tr>
                                        <th style="width: 25%"><la:message
                                                key="labels.dict_synonym_source"/></th>
                                        <td>${f:br(f:h(inputs))}<la:hidden property="inputs"/></td>
                                    </tr>
                                    <tr>

                                            <thead>
                                            <tr>
                                                <th><la:message key="labels.key_match_list_term"/></th>
                                                <th><la:message key="labels.key_match_list_query"/></th>
                                            </tr>
                                            </thead>

                                            </tr>
                                            </thead>
                                            <tbody>
                                            <c:forEach var="artifact" varStatus="s" items="${installedArtifactItems}">
                                                <tr>
                                                    <td>${f:h(artifact.type)}</td>

                                            <thead>
                                            <tr>
                                                <th><la:message
                                                        key="labels.related_content_list_term"/></th>
                                            </tr>
                                            </thead>
                                            <tbody>

                                            <tr>
                                                <th><la:message key="labels.name"/></th>
                                                <th class="text-center" style="width: 20%"><la:message
                                                        key="labels.available"/></th>
                                            </tr>
                                            </thead>

                                    </tr>
                                    <c:forEach var="info" items="${crawlingInfoParamItems}">
                                        <tr>
                                            <th>${f:h(info.keyMsg)}</th>
                                            <td>${f:h(info.value)}</td>
                                        </tr>
                                    </c:forEach>

                                            <thead>
                                            <tr>
                                                <th><la:message key="labels.dict_protwords_source"/></th>
                                            </tr>
                                            </thead>
                                            <tbody>