Set Unit Amenity -
This operations provides the ability to set a unit amenity values .
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******************** NEED TO BE REVISED ***************************
Note, this is for live data only. It will be overridden with appropriate property
management system data nightly.
NOTE: This should be used very cautiously. It should only be called in the rare
occurrence that a unit's amenity changes during the day and it is important
for the price optimization engine to be made aware.