"Cannot resolve method" with mockito

I use `org.springframework.security.core.Authentication` which has a method:

Collection<? extends GrantedAuthority> getAuthorities();

I want to mock it as below:

when(authentication.getAuthorities()).thenReturn(grantedAuthorities);

with authorities collection:

Collection<SimpleGrantedAuthority> grantedAuthorities = Lists.newArrayList(
new SimpleGrantedAuthority(AuthoritiesConstants.USER));

And I am using `org.springframework.security.core.authority.SimpleGrantedAuthority` which extends `GrantedAuthority`

And Intellij gives me below compile error:

Cannot resolve method 'thenReturn(java.util.Collection<org.spring.security.core.authority.SimpleGrantedAuthority>)'

I use Mockito `2.15.0` and `thenReturn()` method from it is:

OngoingStubbing<T> thenReturn(T value);

What is the problem?