testConflictingSymbolAndId() {
    // Create a div with a given id
    const divElement = document.createElement('div');
    divElement.id = 'clashingname';
    document.body.appendChild(divElement);

    // The object at window.clashingname is the element with that id
    assertEquals(window.clashingname, divElement);

    // Export a symbol to a sub-namespace of that id
    const symbolObject = {};
    goog.exportSymbol('clashingname.symbolname', symbolObject);

    // The symbol has been added...
    assertEquals(window.clashingname.symbolname, symbolObject);

    // ...and has not affected the original div
    assertEquals(window.clashingname, divElement);
  }
@suppress {missingProperties} exported properties aren't known