question / feature - generating lists of items within gql statement.

I have a mutation on my Apollo Server which allows for 0-N items in the request. Given the following have you guys any advice on how handle adding 0 or N items ? The base GQL minus the items on the item array is getting correctly generated and being received by my server.

 an_item = {
            "prop": 123,
        }

apply_mutation = gql('''
mutation apply($id: String!, $items: DiscountItemInput!) {
         applyDiscount(
             applyObject: {
              orderId: $id
              storeId: 2             
              items: [
               # can I do variable substitution using a dict here ?
               {
               },
                 .... 0 - N item
              ]
            }
          ) {
           ... list of fields to be returned
          }
        }
       ''')
        params = {
             "Id": 123          
        }
client.execute(apply_mutation, variable_values=params)

[Cito]

Also, can you try with the latest v3.0.0a0?

[KingDarBoja]

Closing now for housekeeping purposes.