public function register( $slug, $callback, $arguments = array(), $active_callback = null ) {
		// Prevent weird stuff here
		$slug = sanitize_title_with_dashes( $slug );

		$defaults = array(
			'callback'        => null,
			'content'         => null,
			'action'          => 'admin_notices',
			'priority'        => 10,
			'expire'          => false,
			'dismiss'         => false,
			'type'            => 'error',
			'is_rendered'     => false,
			'wrap'            => false,
		);

		$defaults['callback'] = array( $this, 'render_' . $slug );
		$defaults['content'] = $callback;

		if ( is_callable( $active_callback ) ) {
			$defaults['active_callback'] = $active_callback;
		}

		// Merge Arguments
		$notice = (object) wp_parse_args( $arguments, $defaults );

		// Enforce this one
		$notice->slug = $slug;

		// Clean these
		$notice->priority = absint( $notice->priority );
		$notice->expire = (bool) $notice->expire;
		$notice->dismiss = (bool) $notice->dismiss;

		// Set the Notice on the array of notices
		$this->notices[ $slug ] = $notice;

		// Return the notice Object because it might be modified
		return $notice;
	}