set_usage
Description:
Sets the usage property to usage.
Set usage to null to unset the property in the postal address.
Parameters:
| this | |
| usage | 
           the new usage for the postal address, or   | 
      
Sets the usage property to usage.
Set usage to null to unset the property in the postal address.
| this | |
| usage | 
           the new usage for the postal address, or   |