code: private static boolean classIsJPAEntity(JavaClass cls) {
  		AnnotationEntry[] annotations = cls.getAnnotationEntries();
  		if (annotations != null) {
  			for (AnnotationEntry annotation : annotations) {
  				if ("Ljavax/persistence/Entity;".equals(annotation.getAnnotationType())) {
  					return true;
  				}
  			}
  		}
  
  		return false;
  	}
docs: returns whether this class is a JPA Entity, as such it shouldn't really have
  a toString()
  
  @param cls the class to check
  @return if the class is a jpa entity