parse(token, context, chain) {
                let promise = Twig.Promise.resolve('');
                const state = this;

                if (chain) {
                    promise = state.parseAsync(token.output, context);
                }

                return promise.then(output => {
                    return {
                        chain,
                        output
                    };
                });
            }
Else type logic tokens.

 Format: {% else %}