unknown.ts:39:25 - error TS2345: Argument of type 'CollectionChangeCallback<Object<Task, never>>' is not assignable to parameter of type 'CollectionChangeCallback<Object<unknown, never>>'.
  Type 'Object<Task, never>' is not assignable to type 'Object<unknown, never>'.
    Types of property 'addListener' are incompatible.
      Type '(callback: ObjectChangeCallback<Task>) => void' is not assignable to type '(callback: ObjectChangeCallback<unknown>) => void'.
        Types of parameters 'callback' and 'callback' are incompatible.
          Types of parameters 'changes' and 'changes' are incompatible.
            Type 'ObjectChangeSet<Task>' is not assignable to type 'ObjectChangeSet<unknown>'.
              Type 'unknown' is not assignable to type 'Task'.

39     watcher.addListener(listener);
                           ~~~~~~~~

import * as Realm from "realm";

const TaskSchema: Realm.ObjectSchema = {
    name: "Task",
    properties: {
        id: { type: "int" },
        name: "string",
    },
}
class Task extends Realm.Object<Task> {
    public static schema: Realm.ObjectSchema = TaskSchema
    constructor(realm: Realm, public id: Realm.Types.Int, public name: Realm.Types.String) {
        super(realm, { id, name })
    }
}

const realm_config: Realm.Configuration = {
    path: "realm-files/myrealm",
    schema: [TaskSchema],
}
async function openRealm() {
    const realm = await Realm.open(realm_config);
    const watcher = realm.objects(Task.schema.name)
    const listener: Realm.CollectionChangeCallback<Realm.Object<Task>> = function (collection: Realm.Collection<Realm.Object<Task, never>>, changes: Realm.CollectionChangeSet): void {
        changes.deletions.forEach((index) => {
            console.log(`A task was deleted at the ${index} index`);
        });
        changes.insertions.forEach((index) => {
            let insertedTasks = collection[index];
            console.log(
                `insertedTasks: ${JSON.stringify(insertedTasks, null, 2)}`
            );
        });
        changes.newModifications.forEach((index) => {
            let modifiedTask = collection[index];
            console.log(`modifiedTask: ${JSON.stringify(modifiedTask, null, 2)}`);
        });
    }
    watcher.addListener(listener);
    return realm
}
const realm = openRealm()