public function register( $tab ) {
		// If Obj is a string, check if it's existing class, then get an instance of it
		if ( is_string( $tab ) && class_exists( $tab ) && method_exists( $tab, 'instance' ) ) {
			$tab = call_user_func_array( array( $tab, 'instance' ), array() );
		}

		// Makes sure that the tab you are registering is extended from the Abstract
		if ( ! is_object( $tab ) || ! in_array( 'Tribe__Events__Aggregator__Tabs__Abstract', class_parents( $tab ) ) ) {
			return false;
		}

		// Set the Tab Item on the array of Tabs
		$this->items[ $tab->get_slug() ] = $tab;

		// Return the tab
		return $tab;
	}