code: public Relationship getEfferentRelationshipWith(Element element) {
          if (element == null) {
              return null;
          }
  
          for (Relationship relationship : relationships) {
              if (relationship.getDestination().equals(element)) {
                  return relationship;
              }
          }
  
          return null;
      }
docs: Gets the efferent (outgoing) relationship with the specified element.
  
  @param element   the element to look for
  @return  a Relationship object if an efferent relationship exists, null otherwise