Allows overriding a platform's default setWindowContext behavior. All calls to Platform.setWindowContext will pass through the override.

Example

const overrideCallback = (PlatformProvider) => {
    class Override extends PlatformProvider {
        async setWindowContext(payload, callerIdentity) {
            // Perhaps in our platform, we wish to only take context updates from windows
            // and ignore updates sent from views.
            if (payload.entityType === 'view') {
                throw new Error('Updating window context from a view is not permitted in this platform.');
            }
            return super.setWindowContext(payload, callerIdentity);
        }
    }
    return new Override();
}

fin.Platform.init({ overrideCallback });