Stores information about the state of a subform. Hierarchy class \Drupal\Core\Form\

protected FormSubmitter::drupalInstallationAttempted()

Stores which errors should be limited during validation. An array of "sections" within which user input must be valid. If the element is within

public &FormStateInterface::getTriggeringElement()

public FormValidatorInterface::setInvalidTokenError(FormStateInterface

The form definition. Type:

public FormStateDecoratorBase::getValidateHandlers()

public FormState::getError(array $element) Returns

public FormStateInterface::setValues(array $values)

public FormStateInterface::isValueEmpty($key)