PluginWithFormsInterface.php

<?php

namespace Drupal\Core\Plugin;

use Drupal\Component\Plugin\PluginInspectionInterface;

/**
 * Provides an interface for plugins which have forms.
 *
 * Plugin forms are embeddable forms referenced by the plugin annotation.
 * Used by plugin types which have a larger number of plugin-specific forms.
 */
interface PluginWithFormsInterface extends PluginInspectionInterface {
    
    /**
     * Gets the form class for the given operation.
     *
     * @param string $operation
     *   The name of the operation.
     *
     * @return string|null
     *   The form class if defined, NULL otherwise.
     */
    public function getFormClass($operation);
    
    /**
     * Gets whether the plugin has a form class for the given operation.
     *
     * @param string $operation
     *   The name of the operation.
     *
     * @return bool
     *   TRUE if the plugin has a form class for the given operation.
     */
    public function hasFormClass($operation);

}