set_property
Description:
[ Version ( since = "0.1.8" ) ]
public async bool set_property (string key, string value, Cancellable? cancellable) throws Error
  public async bool set_property (string key, string value, Cancellable? cancellable) throws Error
Sets a property on the device.
Parameters:
| this | a Device instance. | 
| key | a property key | 
| value | a property key | 
| cancellable | a Cancellable, or null | 
| callback | the function to run on completion | 
| user_data | the data to pass to  |