setUnitExtraProps method
Set extra properties for this specific unit. Stores locally with unit-level tag (always overwrites page/global)
Implementation
void setUnitExtraProps(HashMap<String, String> extraProperties) async {
// Use utility method to handle property storage
TBLPropertiesUtils.setUnitExtraProps(
extraProperties, _unitExtraProperties, TAG, uniqueUnitId);
}