"From" is not a pointer type in all but Message structs

[svscorp]

in gen_types.go

The struct Message has
From *User json:"from,omitempty"``

However the struct CallbackQuery has
From User json:"from"``

Is there a reason to not have "From" as a pointer type in CallbackQuery (and other than Message queries)?

[PaulSonOfLars]

Remember that the library is autogenerated from the docs. So if a field is a pointer, it's because it is optional, and may be empty.
CallbackQueries HAVE to be initiated by a user; someone pressed a button; so From cannot be nil. See: https://core.telegram.org/bots/api#callbackquery