$_field
$_field : string
The field to check
Validates the count of associated records.
__invoke(\Cake\Datasource\EntityInterface $entity, array $options) : boolean
Performs the count check
| \Cake\Datasource\EntityInterface | $entity | The entity from where to extract the fields.  | 
                            
| array | $options | Options passed to the check.  | 
                            
True if successful, else false.