public final void setTransientEnabledOnDates(boolean enabled,
                                                 Iterable<UTCDate> dates) {
        for (UTCDate d : dates) {
            setTransientEnabledOnDates(enabled, d);
        }
    }
Sets a group of visible dates to be enabled or disabled. This is only set
until the next time the DatePicker is refreshed.
stroom-core-client-widget/src/main/java/stroom/widget/datepicker/client/CustomDatePicker.java