The form builder. Type:

public BlockBase::access(AccountInterface $account, $return_as_object = FALSE)

public BlockForm::__construct(EntityManagerInterface $entity_manager, Exec

protected BlockForm::buildVisibilityInterface(array $form, FormStateInterface

Controller routines for admin block routes. Hierarchy class \Drupal\Core\Controller\

Negotiates the theme for the block admin demo page via the URL. Hierarchy class \

block_post_update_fix_negate_in_conditions() Fix invalid 'negate' values in block visibility conditions.

public BlockListBuilder::submitForm(array &$form, FormStateInterface

public BlockBase::blockValidate($form, FormStateInterface $form_state)

public AdminDemoNegotiator::determineActiveTheme