Is posible to reuse field resolver? Also is posible to set global resolver and use by name?

type PresetDates {
edited(format: String): StringDate! @goField(name:"DatetimeFormatResolver")
added(format: String): StringDate! @goField(name:"DatetimeFormatResolver")
}
1 i have many fields where i need to convert some types, in that example i converting date to string, on each field automatically generate a resolver from where i call function that execute a logic , but i think it will be better if i can set somewhere a function directly, it reduce considedable a code, now i have in project arount a 100 same resolvers.

2 also if i set direct name of resolver ( to can reuse one ), it generate a few identical function, is normal?
example generated go interface ( also in resolver appear 2 identical function ):
type PresetDatesResolver interface {
DatetimeFormatResolver(ctx context.Context, obj *structure_999.PresetDates, input *domain.DatetimeFormat) (string, error)
DatetimeFormatResolver(ctx context.Context, obj *structure_999.PresetDates, input *domain.DatetimeFormat) (string, error)
}

3 Is posible to set a global resolver? for some conversion, and set that on field settings