web/embed-dart.html [153:206]:
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        <iframe id="frame" sandbox="allow-scripts allow-popups" class="flex-auto">
        </iframe>
    </div>
    <div class="mdc-snackbar">
        <div class="mdc-snackbar__surface">
            <div class="mdc-snackbar__label"
                 role="status"
                 aria-live="polite">
            </div>
        </div>
    </div>
</section>
<footer flex layout horizontal class="footer">
    <div id="feature-message" class="info-message"></div>
    <div id="issues-message" class="info-message"></div>
    <button id="issues-toggle" class="mdc-button mdc-button--dense mdc-button--outlined" hidden></button>
</footer>

<div id="flash-container" class="position-fixed right-2 bottom-6">
    <div id="test-result-box" class="flash flash-warn" hidden>
        <div title="Close" class="close-flash-container">
            <button class="close-flash-button mdc-icon-button material-icons">close</button>
        </div>
        <div class="message-container custom-scrollbar"></div>
    </div>
    <div id="hint-box" class="flash" hidden>
        <div title="Close" class="close-flash-container">
            <button class="close-flash-button mdc-icon-button material-icons">close</button>
        </div>
        <div class="message-container custom-scrollbar"></div>
    </div>
    <div id="issues" hidden></div>
</div>

<div class="mdc-dialog"
     role="alertdialog"
     aria-modal="true"
     aria-labelledby="my-dialog-title"
     aria-describedby="my-dialog-content">
    <div class="mdc-dialog__container">
        <div class="mdc-dialog__surface">
            <h2 class="mdc-dialog__title" id="my-dialog-title"></h2>
            <div class="mdc-dialog__content" id="my-dialog-content"></div>
            <footer class="mdc-dialog__actions">
                <button type="button" id="dialog-left-button" class="mdc-button mdc-dialog__button">
                    <span class="mdc-button__label">No</span>
                </button>
                <button type="button" id="dialog-right-button" class="mdc-button mdc-dialog__button">
                    <span class="mdc-button__label">Yes</span>
                </button>
            </footer>
        </div>
    </div>
    <div class="mdc-dialog__scrim"></div>
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web/embed-html.html [187:241]:
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        <iframe id="frame" sandbox="allow-scripts allow-popups" class="flex-auto">
        </iframe>
    </div>
    <div class="mdc-snackbar">
        <div class="mdc-snackbar__surface">
            <div class="mdc-snackbar__label"
                 role="status"
                 aria-live="polite">
            </div>
        </div>
    </div>
</section>

<footer flex layout horizontal class="footer">
    <div id="feature-message" class="info-message"></div>
    <div id="issues-message" class="info-message"></div>
    <button id="issues-toggle" class="mdc-button mdc-button--dense mdc-button--outlined" hidden></button>
</footer>

<div id="flash-container" class="position-fixed right-2 bottom-6">
    <div id="test-result-box" class="flash flash-warn" hidden>
        <div title="Close" class="close-flash-container">
            <button class="close-flash-button mdc-icon-button material-icons">close</button>
        </div>
        <div class="message-container custom-scrollbar"></div>
    </div>
    <div id="hint-box" class="flash" hidden>
        <div title="Close" class="close-flash-container">
            <button class="close-flash-button mdc-icon-button material-icons">close</button>
        </div>
        <div class="message-container custom-scrollbar"></div>
    </div>
    <div id="issues" hidden></div>
</div>

<div class="mdc-dialog"
     role="alertdialog"
     aria-modal="true"
     aria-labelledby="my-dialog-title"
     aria-describedby="my-dialog-content">
    <div class="mdc-dialog__container">
        <div class="mdc-dialog__surface">
            <h2 class="mdc-dialog__title" id="my-dialog-title"></h2>
            <div class="mdc-dialog__content" id="my-dialog-content"></div>
            <footer class="mdc-dialog__actions">
                <button type="button" id="dialog-left-button" class="mdc-button mdc-dialog__button">
                    <span class="mdc-button__label">No</span>
                </button>
                <button type="button" id="dialog-right-button" class="mdc-button mdc-dialog__button">
                    <span class="mdc-button__label">Yes</span>
                </button>
            </footer>
        </div>
    </div>
    <div class="mdc-dialog__scrim"></div>
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