code: public static <T> T fill(Class<T> entityClass) {
          if (N.isEntity(entityClass) == false) {
              throw new IllegalArgumentException(entityClass.getCanonicalName() + " is not a valid entity class with property getter/setter method");
          }
  
          final T entity = N.newInstance(entityClass);
  
          fill(entity);
  
          return entity;
      }
docs: Fill the properties of the entity with random values.
  
  @param entityClass entity class with getter/setter methods
  @return