Available Parameter-Values for prefer-statement in exported Query from Azure Log Analytics

Hi all,

When you export a query from Azure Log Analytics to PowerBI, such that the corresponding M-Code is generated automatically, there are several parameters quite at the end of the query, e.g.:

,#"x-ms-app"="AAPBI",#"prefer"="ai.response-thinning=true"],Timeout=#duration(0,0,14,0)])),
TypeMap = #table(
{ "AnalyticsTypes", "Type" }, 
{ 
{ "string",   Text.Type },
{ "int",      Int32.Type },
{ "long",     Int64.Type },
{ "real",     Double.Type },
{ "timespan", Duration.Type },
{ "datetime", DateTimeZone.Type },
{ "bool",     Logical.Type },
{ "guid",     Text.Type },
{ "dynamic",  Text.Type }
}),
DataTable = Source[tables]{0},
Columns = Table.FromRecords(DataTable[columns]),
ColumnsWithType = Table.Join(Columns, {"type"}, TypeMap , {"AnalyticsTypes"}),
Rows = Table.FromRows(DataTable[rows], Columns[name]), 
Table = Table.TransformColumnTypes(Rows, Table.ToList(ColumnsWithType, (c) => { c{0}, c{3}}))
in
Table
in AnalyticsQuery

Does anyone have a clue, what exactly the parameter-value "ai.reponse-thinning=true" behind the "#'prefer'"-statement stands for ?
In the corresponding API documentation for Azure Log Analytics there are a few prefer-options (e.g. "include-statistics=true", etc.), however there is nothing written about the option ai.response-thinning=true...

Also, there has been a similar thread on this topic already. However, the meaning of the specific parameter-values was not clarified.

Looking forward to your responses!

Best regards,

Tom