get_property
  
  Description:
  public unowned string? 
get_property (
string key)
  
 
  
    Look up the value for key on this.
    Parameters:
    
      
        | this | 
        
           A Device. 
         | 
      
      
        | key | 
        
           Name of property. 
         | 
      
    
    Returns:
    
      
        | 
           The value for key or null if key doesn't exist on this. Do not
            free this string, it is owned by this. 
         |