code: @Override
    public String getStringProperty(final String name) throws OptionsException {
      Object val = getProperty(name);
  
      if (!(val instanceof String)) {
        throw new OptionsException("org.bedework.calenv.bad.option.value");
      }
  
      return (String)val;
    }
docs: Return the String value of the named property.
  
  @param name String property name
  @return String value of property
  @throws OptionsException