code: private void initIOSettings() {
          forceWriteAs2DCoords = addSetting(new BooleanIOSetting(OptForceWriteAs2DCoordinates, IOSetting.Importance.LOW,
                                                                 "Should coordinates always be written as 2D?", "false"));
          writeMajorIsotopes = addSetting(new BooleanIOSetting(OptWriteMajorIsotopes, IOSetting.Importance.LOW,
                                                               "Write atomic mass of any non-null atomic mass including major isotopes (e.g. [12]C)", "true"));
          writeAromaticBondTypes = addSetting(new BooleanIOSetting(OptWriteAromaticBondTypes, IOSetting.Importance.LOW,
                                                                   "Should aromatic bonds be written as bond type 4?", "false"));
          writeQueryFormatValencies = addSetting(new BooleanIOSetting(OptWriteQueryFormatValencies,
                                                                      IOSetting.Importance.LOW, "Should valencies be written in the MDL Query format? (deprecated)", "false"));
          writeDefaultProps = addSetting(new BooleanIOSetting(OptWriteDefaultProperties,
                                                              IOSetting.Importance.LOW,
                                                              "Write trailing zero's on atom/bond property blocks even if they're not used.",
                                                              "true"));
          programNameOpt = addSetting(new StringIOSetting(OptProgramName,
                                                          IOSetting.Importance.LOW,
                                                          "Program name to write at the top of the molfile header, should be exactly 8 characters long",
                                                          "CDK"));
      }
docs: Initializes IO settings.<br>
  Please note with regards to "writeAromaticBondTypes": bond type values 4 through 8 are for SSS queries only,
  so a 'query file' is created if the container has aromatic bonds and this settings is true.