Using the default focal point on new crop entities error

Problem/Motivation

When you need to do a batch process to update many entity and the process fail.

Steps to reproduce

You need to have a process batch to update large amount of data and some data is pass a null value in a entity.

Proposed resolution

you should replace this line:

if ($crop->isNew()) {

to:

if ($crop && $crop instanceof \Drupal\crop\Entity\Crop && $crop->isNew()) {