Where is LearnMoreUrl of custom data connector used in PowerBI Desktop?

Hi, I see that there is a LearnMoreUrl field in UI publishing part code of building PowerBI custom data connector, but I did not see where it is used in PowerBI Desktop. Could anyone show that where it is used? Thanks!

https://docs.microsoft.com/en-us/power-query/handlingdataaccess

LeanMoreUrl, text, (optional) Url to website containing more information about this data source or connector.

https://github.com/microsoft/DataConnectors/blob/dbd99078501897e04e7a6b9305ad7857ae1b7a63/samples/Relationships/Relationships.pq

Relationships.PublishNone= [
    Beta = true,
    Category = "Other",
    ButtonText = { "Relationship - None", "Relationship - None" },
    LearnMoreUrl = "https://powerbi.microsoft.com/"
];