Pick an item for sales order line based on batch after item qty is reserved

Dear All,

Please find below scenario in which i need your help.

I have create a sales order having 1 line with 15 qty and item have dimensions batchid,warehouse and location.

now I have to deliver 5 qty , so I have to create a packing slip of 5 qty .

For that I have reserved 10 qty of item with different batch no. I have reserved through x++ code.

Now I have to pick 5 qty out of 10 qty reserved through x ++ code for sales order line number 1.  through x++ code.(Here is i got stucked , I need code to pick these 5 qty through x++ code)

once Item is picked , I am able to create packing slip for 5 qty through x ++ code.

Please provide me code to pick item for sales order line through x++ code

We are using Ax 2012 r3 CU8.