@GwtIncompatible // TODO
  public void testSqrtExactMatchesFloorOrThrows() {
    for (long x : POSITIVE_LONG_CANDIDATES) {
      long sqrtFloor = LongMath.sqrt(x, FLOOR);
      // We only expect an exception if x was not a perfect square.
      boolean isPerfectSquare = sqrtFloor * sqrtFloor == x;
      try {
        assertEquals(sqrtFloor, LongMath.sqrt(x, UNNECESSARY));
        assertTrue(isPerfectSquare);
      } catch (ArithmeticException e) {

@argument {Object} data - The data object generated by `update` method\n * @argument {Boolean} shouldRound - If the offsets should be rounded at all\n * @returns {Object} The popper's position offsets rounded\n *\n * The tale of pixel-perfect positioning. It's still not 100% perfect, but as\n * good as it can be within reason.\n * Discussion here: https://github.com/FezVrasta/popper.js/pull/715\n *\n * Low DPI screens cause a popper to be blurry if not using full pixels (Safari\n * as well on High DPI screens).\n...

1D1C0         ; mapped                 ; 1D1BA 1D165 1D16F #3.1 MUSICAL SYMBOL FUSA BLACK
1D1C1..1D1DD  ; valid                  ;      ; NV8    # 3.1  MUSICAL SYMBOL LONGA PERFECTA REST..MUSICAL SYMBOL PES SUBPUNCTIS
1D1DE..1D1E8  ; valid                  ;      ; NV8    # 8.0  MUSICAL SYMBOL KIEVAN C CLEF..MUSICAL SYMBOL KIEVAN FLAT SIGN