Incremental refresh for custom connector with call to REST API: RangeStart and RangeEnd

Here  is the full code:

[Version = "1.0.0"]
section Foo;

[DataSource.Kind = "Foo", Publish = "Foo.Publish"]
shared Foo.Contents = Value.ReplaceType(FooNavTable, type function (Url as Uri.Type, optional RangeStart as nullable datetime, optional RangeEnd as nullable datetime) as any);

DefaultRequestHeaders = [
#"Content-Type" = "application/json",
#"api-key" = Extension.CurrentCredential()[Key]
];

FooNavTable = (url as text, optional rangeStart as nullable datetime, optional rangeEnd as nullable datetime) as table =>
let
source = Json.Document(Web.Contents(url, [Headers = DefaultRequestHeaders, RelativePath = "navTable"])),
tablesList = List.Transform(source, each
[
Name = _[Name],
KeyColumn = _[KeyColumn], // Der Schlüssel sollte eindeutig sein
Data = GetTable(url, Name, KeyColumn, _[Schema], rangeStart, rangeEnd),
ItemKind = "Table",
ItemName = "Table",
IsLeaf = true
]),

tablesTable = Table.FromRecords(tablesList),

navigationTable = Table.ToNavigationTable(tablesTable, {"Name"}, "Name", "Data", "ItemKind", "ItemName", "IsLeaf")
in
navigationTable;

GetTable = (url as text, tableName as text, keyColumn as text, schema as record, optional rangeStart as nullable datetime, optional rangeEnd as nullable datetime) as table =>
let
startDate = if rangeStart = null then "" else DateTime.ToText(rangeStart, "yyyy-MM-dd"),
endDate = if rangeEnd = null then "" else DateTime.ToText(rangeEnd, "yyyy-MM-dd"),
source = Json.Document(Web.Contents(url, [Headers = DefaultRequestHeaders, Query=[rangeStart=startDate, rangeEnd=endDate], RelativePath = tableName])),
toTable = Table.FromRecords(source),
typedTable = SetDataTypes(toTable, schema),
typedTableWithKey = Table.AddKey(typedTable, { keyColumn }, true)
in
typedTableWithKey;

SetDataTypes = (table as table, schema as record) as table =>
let
schemaTable = Record.ToTable(schema),
transformationList = List.Transform(Table.ToRows(schemaTable),
each {_{0}, GetTypeFromString(_{1})
}),
transformedTable = Table.TransformColumnTypes(table, transformationList)
in
transformedTable;

GetTypeFromString = (typeString as text) as type =>
let
result = if typeString = "number" then Int64.Type
else if typeString = "string" then Text.Type
else if typeString = "boolean" then Logical.Type
else if typeString = "Date" then Date.Type
else if typeString = "DateTime" then DateTime.Type
else if typeString = "Time" then Time.Type
else if typeString = "Decimal" then Decimal.Type
else Any.Type
in result;