How to add documentation to custom functions in Power Query Custom Connector?

Here is a sample of a more complete connector:

    FunctionType = let 
            paramType = type text meta [
                Documentation.FieldCaption = ...
            ],
            t = type function (param as paramType) as table
        in             
t meta [
                Documentation.Description = ...,
                Documentation.DisplayName = ...,
                Documentation.Caption = ...,
                Documentation.Name = ...,
                Documentation.LongDescription = ...,
                Documentation.Examples = {[
                    Description = ...,
                    Code = ...,
                    Result = ...
                ]}
            ],