Can Unstateful Containers see each other?

unstateful containers.js

type LoginProvidersState = {
    +loadedState: string,
    +providers: {
        [key: string]: string
    }
};

export class LoginProvidersContainer extends Container<LoginProvidersState> {
    state = {
        loadedState: PENDING,
        providers: {} // This is a map of Provider ID onto a URI to start authentication
    };
    
    // More code in here
}

type AccessToken = {
    +token: string,
    +expires: string
};

type AccessTokenState = {
    +token: ?AccessToken
};

export class AccessTokenContainer extends Container<AccessTokenState> {
    state = {};
    
    async authenticate(provider) {
        // Can this get the Authentication URI from the LoginProvidersContainer?
        // Or must it be that the calling code looks it up in one Container and provides it to the other?
    }
}