unable to remove the value of select

[DoneSpeak]

I can use the following request to remove the value of select.

PATCH https://api.notion.com/v1/pages/:id
{
    "properties": {
        "ProjectType": {
            "select": null
        }
    }
}

But when used the notionapi pkg to send the request, I cann't set the select to nil. Because the type of select is notionapi.Option instead of *notionapi.Option.

type SelectProperty struct {
	ID     ObjectID           `json:"id,omitempty"`
	Type   PropertyType `json:"type,omitempty"`
	Select Option            `json:"select"`
}

when I used notionapi.Option{} as the value of Select, I got the following errer response:

body.properties.ProjectType.select.id should be defined, instead was `undefined`.
body.properties.ProjectType.select.name should be populated, instead was `""`.

How can I remove the value of select propery?