pdateClass;
				}

				if ( $updateClass !== null ) {
					$this->update = call_user_func(array($updateClass, 'fromObject'), $state->update);
				}
			}
		}

		public function delete() {
			delete_site_option($this->optionName);

			$this->lastCheck = 0;
			$this->checkedVersion = '';
			$this->update = null;
		}

		private function getLibPrefix() {
			$parts = explode('_', __CLASS__, 3);
			return $parts[0] . '_' . $parts[1] . '_';
		}
	}

endif;