code: public static final <T extends Calendar> Function<T, MutableDateTime> calendarToMutableDateTime(DateTimeZone dateTimeZone) {
          return FnMutableDateTime.calendarToMutableDateTime(dateTimeZone);
      }
docs: <p>
  It converts a {@link Calendar} into a {@link MutableDateTime} in the given {@link DateTimeZone}
  </p>
  
  @param dateTimeZone the the time zone ({@link DateTimeZone}) to be used
  @return the {@link MutableDateTime} created from the input and arguments
  
  @since 1.1