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/Drupal 8

public function ArrayElement::isNullable

public ArrayElement::isNullable()

Determines if this element allows NULL as a value.

Return value

bool TRUE if NULL is a valid value, FALSE otherwise.

File

core/lib/Drupal/Core/Config/Schema/ArrayElement.php, line 160

Class

ArrayElement
Defines a generic configuration element that contains multiple properties.

Namespace

Drupal\Core\Config\Schema

Code

public function isNullable() {
  return isset($this->definition['nullable']) && $this->definition['nullable'] == TRUE;
}

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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Config!Schema!ArrayElement.php/function/ArrayElement::isNullable/8.1.x