Current discussing model
-------------------------

	-------------------------------------------------
	|						|
	|     		Java Script API 		|
	|						|
	-------------------------------------------------
			^			^
			|			|
			v			v
	---------------------------------    ------------
	|				|    |		|
	|	High Level API		|    |Constraints|
	|				|    |		|
	---------------------------------    ------------
			^			^
			|			|
			v			v
	-------------------------------------------------
	|						|
	|     		Low Level API 			|
	|						|
	-------------------------------------------------
				^
				|
				v
	-------------------------------------------------
	|						|
	|     		Implementation detail		|
	|						|
	-------------------------------------------------



-------------------------------------------------------------------------------------

Proposal A
-----------

	-------------------------------------------------
	|						|
	|     		Java Script API 		|
	|						|
	-------------------------------------------------
			^	    		   ^
			|			   |
			v			   v
	---------   ------------------------    ------------
	|	|   |		           |    |	    |
	|Helper |   |  High Level API	   |    |Constraints|
	|API	|   |		           |    |API	    |
	---------   ------------------------    ------------
			^			   ^
			|			   |
			v			   v
	-------------------------------------------------
	|						|
	|     		Low Level API 			|
	|						|
	-------------------------------------------------
				^
				|
				v
	-------------------------------------------------
	|						|
	|     		Implementation detail		|
	|						|
	-------------------------------------------------


--------------------------------------------------------------------------------------


Proposal B
-----------

	-------------------------------------------------
	|						|
	|     		Java Script API 		|
	|						|
	-------------------------------------------------
			^	    		   ^
			|			   |
			v			   v
	---------   ------------------  ---------    -------------
	|set	|   |		     |  |get    |    |	         |
	|Helper |   |  High Level API|	|Helper |    |Constraints|
	|API	|   |		     |  |API    |    |API	 |
	---------   ------------------  ---------    -------------
			^			   ^
			|			   |
			v			   v
	-------------------------------------------------
	|						|
	|     		Low Level API 			|
	|						|
	-------------------------------------------------
				^
				|
				v
	-------------------------------------------------
	|						|
	|     		Implementation detail		|
	|						|
	-------------------------------------------------



--------------------------------------------------------------------------------------