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I created a custom content type called 'slide' that has a custom select field called 'field_category'. I would like to be able to load the available options of 'field_category' into the select field of a block form.

I'm currently attempting to follow the instructions of an answer to a similar question here but I'm still having trouble.

I'm grabbing the content type definitions like so

$definitions = \Drupal::service('entity_field.manager')->getFieldDefinitions('node', 'slide');

However when I spit out

print_r($definitions->getFieldDefinition('field_category'))

I can't actually find any of the options to grab. Is there a way to grab the available options of a field of a custom content type programmatically?

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$definitions = \Drupal::service('entity_field.manager')->getFieldDefinitions('node', 'slide');
$definition = $definitions['field_category'];
$settings = $definition->getSettings();
$allowed_values = $settings['allowed_values'];

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