interface DeletedFieldsRepositoryInterface

interface DeletedFieldsRepositoryInterface {
    
    /**
     * Returns a list of deleted field definitions.
     *
     * @param string $field_storage_unique_id
     *   (optional) A unique ID of field storage definition for filtering the
     *   deleted fields. Defaults to NULL.
     *
     * @return \Drupal\Core\Field\FieldDefinitionInterface[]
     *   An array of field definition objects, keyed by their unique identifier.
     */
    public function getFieldDefinitions($field_storage_unique_id = NULL);
    
    /**
     * Returns a list of deleted field storage definitions.
     *
     * @return \Drupal\Core\Field\FieldStorageDefinitionInterface[]
     *   An array of field storage definition objects, keyed by their unique
     *   storage identifier.
     */
    public function getFieldStorageDefinitions();
    
    /**
     * Adds a field definition object to the deleted list.
     *
     * @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
     *   A field definition object.
     *
     * @return $this
     */
    public function addFieldDefinition(FieldDefinitionInterface $field_definition);
    
    /**
     * Adds a field storage definition object to the deleted list.
     *
     * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $field_storage_definition
     *   A field storage definition object.
     *
     * @return $this
     */
    public function addFieldStorageDefinition(FieldStorageDefinitionInterface $field_storage_definition);
    
    /**
     * Removes a field definition object from the deleted list.
     *
     * @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
     *   A field definition object.
     *
     * @return $this
     */
    public function removeFieldDefinition(FieldDefinitionInterface $field_definition);
    
    /**
     * Removes a field storage definition object from the deleted list.
     *
     * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $field_storage_definition
     *   A field storage definition object.
     *
     * @return $this
     */
    public function removeFieldStorageDefinition(FieldStorageDefinitionInterface $field_storage_definition);

}