get_transition_type
Description:
Gets the type of animation that will be used for transitions between modes and children in this.
Parameters:
| this | 
           a Leaflet  | 
      
Returns:
| 
           the current transition type of this  | 
      
Gets the type of animation that will be used for transitions between modes and children in this.
| this | 
           a Leaflet  | 
      
| 
           the current transition type of this  |