Unit of Pressure which is used through the model. This is not an IObject implementation and as such does not have an ID value. Instead, the entire object is embedded into the containing class, so that the value and unit rows can be found on the table itself (e.g. imagingEnvironment.pressure and imagingEnvironment.pressureUnit).
Actual value for this unit-based field. The interpretation of the value is only possible along with the enums::UnitsPressure enum.
enums::UnitsPressure instance which is an IObject meaning that its ID is sufficient for identifying equality.
Returns the possibly unicode representation of the "unit" value for display.