return when {
      offset >= 0 -> offset * 4 // This section was found by binary search.
      else -> (-offset - 2) * 4 // Not found? Use the preceding element.
    }
  }

  /**
   * Binary search [ranges] for [codePoint], looking at its bottom 7 bits.
   *
   * This binary searches over 4-byte entries, and so it needs to adjust binary search indices
   * in (by dividing by 4) and out (by multiplying by 4).
   */

   * given to [connectionUser] who may (for example) assign it to a [RealCall.connection].
   *
   * This confirms the returned connection is healthy before returning it. If this encounters any
   * unhealthy connections in its search, this will clean them up.
   *
   * If [routes] is non-null these are the resolved routes (ie. IP addresses) for the connection.
   * This is used to coalesce related domains to the same HTTP/2 connection, such as `square.com`

1F540..1F543  ; valid                  ;      ; NV8    # 6.1  CIRCLED CROSS POMMEE..NOTCHED LEFT SEMICIRCLE WITH THREE DOTS
1F544..1F54A  ; valid                  ;      ; NV8    # 7.0  NOTCHED RIGHT SEMICIRCLE WITH THREE DOTS..DOVE OF PEACE
1F54B..1F54F  ; valid                  ;      ; NV8    # 8.0  KAABA..BOWL OF HYGIEIA
1F550..1F567  ; valid                  ;      ; NV8    # 6.0  CLOCK FACE ONE OCLOCK..CLOCK FACE TWELVE-THIRTY