Annotation @reference is disallowed for this location

Issue: 

Annotation @reference is disallowed for this location.

Solution: 

There are multiple ways to use @Reference annotations in OSGi annotations.

Option 1: 

@Reference

MyService myService;

Option 2:

private MyService myService;

@Reference

public void bindMyService(MyService myService) {

     this.myService = myService;

}

public void unbindMyService(MyService myService) {

     this.myService = myService;

}

To avoid this error use option 2.