Condition.php

<?php

namespace Drupal\Core\Condition\Annotation;

use Drupal\Component\Annotation\Plugin;

/**
 * Defines a condition plugin annotation object.
 *
 * Condition plugins provide generalized conditions for use in other
 * operations, such as conditional block placement.
 *
 * Plugin Namespace: Plugin\Condition
 *
 * For a working example, see \Drupal\user\Plugin\Condition\UserRole.
 *
 * @see \Drupal\Core\Condition\ConditionManager
 * @see \Drupal\Core\Condition\ConditionInterface
 * @see \Drupal\Core\Condition\ConditionPluginBase
 * @see block_api
 *
 * @ingroup plugin_api
 *
 * @Annotation
 */
class Condition extends Plugin {
    
    /**
     * The condition plugin ID.
     *
     * @var string
     */
    public $id;
    
    /**
     * The human-readable name of the condition.
     *
     * @ingroup plugin_translatable
     *
     * @var \Drupal\Core\Annotation\Translation
     */
    public $label;
    
    /**
     * The name of the module providing the type.
     *
     * @var string
     */
    public $module;
    
    /**
     * An array of context definitions describing the context used by the plugin.
     *
     * The array is keyed by context names.
     *
     * @var \Drupal\Core\Annotation\ContextDefinition[]
     */
    public $context_definitions = [];
    
    /**
     * The category under which the condition should listed in the UI.
     *
     * @var \Drupal\Core\Annotation\Translation
     *
     * @ingroup plugin_translatable
     */
    public $category;

}