M Power Query: how can I reuse a function between multiple queries?

Hi!

I have created a custom function that is written into the top of my Power Query M code, and that I use in the transformations of the table in that query.

But I would like to reuse the same function in another query, without having to rewrite the same function and copy paste it into the other queries M code.

How would I do that?

Could I define a separate generic function somewhere in the query editor, that I then can reuse in whatever queries I create? That would be great.

Or can I somehow get access to the custom function written into queryA, from queryB ?

Thanks in advance

This is the function I have written into the M code for a query I have

    //custom function to convert dateTime values to Stockholm timezone    
    convertUTCDateTimeToStockholmTZ = (dateTimeValue) =>
                let 
                    convertedValue =        
                          if dateTimeValue >= DateTime.FromText("2016-03-27T02:00:00") and dateTimeValue < DateTime.FromText("2016-10-27T03:00:00")
	then
		//summertime (+2 hours from UTC)
		dateTimeValue + #duration(0,2,0,0)
	else if
                dateTimeValue >= DateTime.FromText("2017-03-26T02:00:00") and dateTimeValue < DateTime.FromText("2017-10-29T03:00:00")
	then
		//summertime (+2 hours from UTC)
		dateTimeValue + #duration(0,2,0,0)
	else if
            dateTimeValue >= DateTime.FromText("2018-03-25T02:00:00") and dateTimeValue < DateTime.FromText("2018-10-28T03:00:00")
	then
		//summertime (+2 hours from UTC)
		dateTimeValue + #duration(0,2,0,0)
	else if
                dateTimeValue >= DateTime.FromText("2019-03-31T02:00:00") and dateTimeValue < DateTime.FromText("2019-10-27T03:00:00")
 then 
	//this is summertime, 
	//add +2 hours to get Stockholm summer time
	dateTimeValue + #duration(0,2,0,0)
else
	//this is wintertime
	//add +1 hours to get Stockholm winter time
	dateTimeValue + #duration(0,1,0,0)
                in 
                    convertedValue,
    //end custom function
    //---------------