code: public String getId() {
  
      String id = this.argument.id();
      if ((id == null) || (id.length() == 0)) {
        id = this.argument.name();
      }
      return id;
    }
docs: This method gets the {@link CliArgument#id() ID} of the {@link CliArgument argument}.
  
  @return the {@link CliArgument#id() ID} or the {@link CliArgument#name() name} if ID is not set.