modules/base/src/main/java/javafx/beans/property/ObjectProperty.java

*** 26,35 ****
--- 26,38 ----
  package javafx.beans.property;
  
  import javafx.beans.binding.Bindings;
  import javafx.beans.value.ObservableValue;
  import javafx.beans.value.WritableObjectValue;
+ import javafx.collections.ObservableList;
+ import javafx.collections.ObservableMap;
+ import javafx.collections.ObservableSet;
  
  /**
   * This class provides a full implementation of a {@link Property} wrapping an
   * arbitrary {@code Object}.
   *