We have two warehouse I wanted to list both warehouse picks on the one slip – not have to print the individual lips by selecting the working warehouse 
 
There does not seem to be any documentation on [%picking_list
order_id:'[@form:id@]' warehouse_id:'[@form:warehouse_id@]'
 
I worked out that I can put the list in the template twice 
[%picking_list order_id:'[@form:id@]' warehouse_id:'1'
[%picking_list order_id:'[@form:id@]' warehouse_id:'2'
 
Which displays both blocks of data and pick list for each
warehouse 
But then I only wanted to display the block if there was
something to pick for that warehouse 
 
Tried to add 
[%param *ifempty%]No items to pick for this warehouse[%/param%]
 
I also tried to setup a global variable to display the block
only if there were records found for an order 
i.e. using https://developers.maropost.com/documentation/neto-designer-documentation/b-se-tag-library/function-tags/orders/show_order/ 
to somehow set the count of order line items as a global variable to use later but could not do that 
 
Any suggestions