GetTableData

let
  PageRange = {1..100},
  Source = List.Transform(PageRange, each try {_, fnGetCollectionData(_)} otherwise null),
  First = List.FirstN(Source, each _ <> null),
  Table = Table.FromRows(First, {"Page", "Column1"}),
  split = Splitter.SplitTextByDelimiter(","),
  fieldnames = split(fnGetParameter("fields")), 
  Expanded = Table.ExpandTableColumn(Table, "Column1", fieldnames)
in
  Expanded