Gets the unit that the field is measured _in.
!(p)
The unit of the field is the period that varies within the range.
For example, _in the field 'MonthOfYear', the unit is 'Months'.
See also {@link #getRangeUnit()}.
@return the unit defining the base unit of the field, not null
Gets the unit that the field is measured _in. !(p) The unit of the field is the period that varies within the range. For example, _in the field 'MonthOfYear', the unit is 'Months'. See also {@link #getRangeUnit()}.
@return the unit defining the base unit of the field, not null