Overrides \Drupal\block\BlockBase::blockForm().
Overrides BlockBase::blockForm
public function blockForm($form, &$form_state) {
$form['block_count'] = array(
'#type' => 'select',
'#title' => t('Number of recent content items to display'),
'#default_value' => $this->configuration['block_count'],
'#options' => drupal_map_assoc(array(
2,
3,
4,
5,
6,
7,
8,
9,
10,
11,
12,
13,
14,
15,
16,
17,
18,
19,
20,
25,
30,
)),
);
return $form;
}