DocumentsProperty
Description:
Creates a new Entry with the given ID and default properties.
Parameters:
| key | 
           the property's key  | 
      
Returns:
| 
           a new DocumentsProperty; unref with unref  | 
      
Creates a new Entry with the given ID and default properties.
| key | 
           the property's key  | 
      
| 
           a new DocumentsProperty; unref with unref  |