/**
* Sets the status of rounding to use the specified field and ROUND_FLOOR mode. A null field will
* disable rounding. Once set, the instant is then rounded using the new field and mode.
*
* <p>Enabling rounding will cause all subsequent calls to {@link #setMillis(long)} to be rounded.
* This can be used to control the precision of the instant, for example by setting a rounding
* field of minuteOfDay, the seconds and milliseconds will always be zero.
*
* @param field rounding field or null to disable
*/
public void setRounding(DateTimeField field) {
setRounding(field, MutableDateTime.ROUND_FLOOR);
}
