A protected field is not accessible unless we are referencing it from within a
class which extends its owner. Therefore, we may use a synthetic property with
the same name as long as we do not have access to the field.

In these cases, the getMethod of the property will not have a Psi element and we
need to traverse up the overrides until we find one that does.

So we are closer to a realistic setup and can tell when we accidentally look up
a class in the wrong project.
Also allows us to have changes in a class but not to the class or its
package (i.e. same file).