src/main/java/de/vandermeer/execs/options/ExecS_CliParser.java
public boolean hasOption(Option option){
		if(option==null){
			return false;
		}
		if(this.usedOptions.contains(option.getOpt())){
			return true;
		}
		if(this.usedOptions.contains(option.getLongOpt())){
			return true;
		}
		return false;
	}
public boolean hasOption(Option option){
		if(option==null){
			return false;
		}
		if(this.usedOptions.contains(option.getOpt())){
			return true;
		}
		if(this.usedOptions.contains(option.getLongOpt())){
			return true;
		}
		return false;
	}
Tests if an option is already added to the parser.
@param option the option to test for
@return false if option was null or n short and long version of this option is used, true otherwise