declare class RealmResults {
    length:number;
    filtered(query:string, arg:?any):RealmResults;
    snapshot():RealmResults;
    sorted(descriptor:any, reverse:?boolean):RealmResults;
}

declare class RealmList {
    length:number;
    filtered(query:string, arg:?any):RealmResults;
    pop():Object|undefined;
    push(...object:Object):number;
    shift():Object|undefined;
    snapshot():RealmResults;
    sorted(descriptor:any, reverse:?boolean):RealmResults;
    unshift(...object:Object):number;
}

declare type RealmObjectSchemaProperty = {
    type:string;
    objectType:?string;
    default:?any;
    optional:?boolean;
}

declare type RealmObjectSchema = {
    name:string;
    primaryKey:?string;
    properties:any;
}

declare type RealmConfiguration = {
    path:?string;
    schema:?RealmObjectSchema;
    schemaVersion:?number;
}

declare class Realm {
    defaultPath:string;
    constructor(config:?RealmConfiguration):void;
    addListener(name:string, callback:()=>void);
    create(type:string, properties:Object, update:?boolean):Object;
    delete(object:Object|Array<Object>|RealmList|RealmResults):void;
    deleteAll():void;
    objects(type:string):RealmResults;
    removeAllListeners(name:?string):void;
    write(callback:()=>void);
}