How i get attachment image?

[prima101112]

this library is really good but i have problem download and manipulate message with attachment base on the fb bots doc fb dev doc i adding new filed on struct

type ReceivedMessage struct {
	Message
	Id  string `json:"mid"`
	Seq int    `json:"seq"`
	Attachment []Attachment `json:"attachments"`
}

it would be great if its officials or should i create PR?

thanks