code: public CommandLine setToggleBooleanFlags(boolean newValue) {
          getCommandSpec().parser().toggleBooleanFlags(newValue);
          for (CommandLine command : getCommandSpec().subcommands().values()) {
              command.setToggleBooleanFlags(newValue);
          }
          return this;
      }
docs: Sets whether the value of boolean flag options should be "toggled" when the option is matched. The default is {@code true}.
  <p>The specified setting will be registered with this {@code CommandLine} and the full hierarchy of its
  subcommands and nested sub-subcommands <em>at the moment this method is called</em>. Subcommands added
  later will have the default setting. To ensure a setting is applied to all
  subcommands, call the setter last, after adding subcommands.</p>
  @param newValue the new setting
  @return this {@code CommandLine} object, to allow method chaining
  @since 3.0