public boolean addActivityDiagram(ActivityDiagram diagram) {
if (canAddActivityDiagram()) {
mActivityDiagram = diagram;
mActivityDiagram.setParent(this);
return true;
}
return false;
}
public boolean removeActivityDiagram() {
if (mActivityDiagram != null) {
mActivityDiagram.setParent(null);
mActivityDiagram = null;
return true;
}
return false;
}