code: public CommandLine setEndOfOptionsDelimiter(String delimiter) {
          getCommandSpec().parser().endOfOptionsDelimiter(delimiter);
          for (CommandLine command : getCommandSpec().subcommands().values()) {
              command.setEndOfOptionsDelimiter(delimiter);
          }
          return this;
      }
docs: Sets the end-of-options delimiter that signals that the remaining command line arguments should be treated as positional parameters.
  @param delimiter the end-of-options delimiter; must not be {@code null}. The default is {@code "--"}.
  @return this {@code CommandLine} object, to allow method chaining
  @since 3.5