=== Plain.java
public class Plain {}
=== Use.java
public class Use {
  Plain p = new Plain();
}
=== expected
symbol Plain.java:1 Plain class
symbol Use.java:1 Use class
edge Use.java:2 Use calls Plain -> Plain.java:1 Plain EXTRACTED 1
edge Use.java:2 Use references Plain -> Plain.java:1 Plain EXTRACTED 1
