node-groupme/src/structures/GroupMessage.ts

The only GroupMe API library that isn't a million years old.

import type { APIGroupMessage } from 'groupme-api-types'
import type { Client, Group } from '..'
import { Message } from '..'

interface GroupMessageInterface {}

export default class GroupMessage extends Message<Group> implements GroupMessageInterface {
    constructor(client: Client, group: Group, data: APIGroupMessage) {
        super(client, group, data)
    }
}