'#default_value' => 2,
];
+ $form['duplicate_button'] = [
+ '#type' => 'submit',
+ '#name' => 'duplicate_button',
+ '#value' => 'Duplicate button 1',
+ ];
+
+ $form['duplicate_button_2'] = [
+ '#type' => 'submit',
+ '#name' => 'duplicate_button',
+ '#value' => 'Duplicate button 2',
+ ];
+
+ $form['test_textarea_with_newline'] = [
+ '#type' => 'textarea',
+ '#title' => 'Textarea with newline',
+ '#default_value' => "Test text with\nnewline",
+ ];
+
$form['save'] = [
'#type' => 'submit',
'#value' => $this->t('Save'),