Looping Sources

Hi all,

I'm new to PowerBI, hope to get some help. 

I want to build someting around the json webAPI's of MoySklad. There stored demands with links to their positions, that contains links to products. Link for demand's positions looks like this: 

https://online.moysklad.ru/api/remap/1.1/entity/demand/{id}/positions

for one Demand code looks like this:

letИсточник = Json.Document(Web.Contents("https://online.moysklad.ru/api/remap/1.1/entity/demand/ad760bfb-7b5c-11e3-49fe-002590a28eca/positions")),
    rows = Источник[rows],
    #"Преобразовано в таблицу" = Table.FromList(rows, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
    #"Развернутый элемент Column1" = Table.ExpandRecordColumn(#"Преобразовано в таблицу", "Column1", {"meta", "id", "accountId", "quantity", "price", "discount", "vat", "assortment", "overhead"}, {"Column1.meta", "Column1.id", "Column1.accountId", "Column1.quantity", "Column1.price", "Column1.discount", "Column1.vat", "Column1.assortment", "Column1.overhead"}),
    #"Развернутый элемент Column1.assortment" = Table.ExpandRecordColumn(#"Развернутый элемент Column1", "Column1.assortment", {"meta"}, {"Column1.assortment.meta"}),
    #"Развернутый элемент Column1.assortment.meta" = Table.ExpandRecordColumn(#"Развернутый элемент Column1.assortment", "Column1.assortment.meta", {"href"}, {"Column1.assortment.meta.href"})
in
    #"Развернутый элемент Column1.assortment.meta"

I want to load all the position for all the demands so I can drill down my analysis to products level.

basically i understand, that i need loop my request with demand's IDs, but is Power BI able to do this?

Thanks in advance,

Dmitry