final List<ChatSource> sources = new ArrayList<>();

        message.setId("msg-123");
        message.setRole("assistant");
        message.setContent("Test content");
        message.setTimestamp(timestamp);
        message.setSources(sources);

        assertEquals("msg-123", message.getId());
        assertEquals("assistant", message.getRole());

     */
    public String getContent() {
        return content;
    }

    /**
     * Sets the message content.
     *
     * @param content the message content
     */
    public void setContent(final String content) {
        this.content = content;
    }

    /**
     * Gets the message timestamp.
     *
     * @return the message timestamp
     */

    private RelatedContent createRelatedContent(String term, String content, String virtualHost) {
        RelatedContent entity = new RelatedContent();
        entity.setTerm(term);
        entity.setContent(content);
        entity.setVirtualHost(virtualHost);
        return entity;
    }

    // Mock classes

    static class MockRelatedContentBhv extends RelatedContentBhv {

this.setElementContent($tip.find(SELECTOR_TITLE), this.getTitle())\n    let content = this._getContent()\n    if (typeof content === 'function') {\n      content = content.call(this.element)\n    }\n\n    this.setElementContent($tip.find(SELECTOR_CONTENT), content)\n\n    $tip.removeClass(`${CLASS_NAME_FADE} ${CLASS_NAME_SHOW}`)\n  }\n\n  // Private\n  _getContent() {\n    return this.element.getAttribute('data-content') ||\n      this.config.content\n  }\n\n  _cleanTipClass() {\n    const $tip = $(this.getTipElement())\n...