handleExtendedWesternEuropeanChar_(b1, b2) {
    // Get the char set from the LSB, which is the char set toggle bit.
    const charSet = b1 & 0x01 ?
          shaka.cea.Cea608Memory.CharSet.PORTUGUESE_GERMAN:
          shaka.cea.Cea608Memory.CharSet.SPANISH_FRENCH;

    this.curBuf_.addChar(charSet, b2);
  }
Handles an Extended Western European byte pair.
@param {number} b1 Byte 1.
@param {number} b2 Byte 2.
@private