commons-file/src/main/java/jargs/gnu/CmdLineParser.java
public final Option addDoubleOption( char shortForm, String longForm ) {
        return addOption(new Option.DoubleOption(shortForm, longForm));
    }
public final Option addDoubleOption( char shortForm, String longForm ) {
        return addOption(new Option.DoubleOption(shortForm, longForm));
    }
Convenience method for adding a double option.
@return the new Option