fix extend example
fix extend example

context should be passed outer scope

sn1ckers/hbs,gnowoel/hbs,sn1ckers/hbs,PeterPanen/hbs,cgvarela/hbs,flenter/hbs,AlexanderMazaletskiy/hbs,PeterPanen/hbs,gnowoel/hbs,umayr/hbs,flenter/hbs,cgvarela/hbs,donpark/hbs,umayr/hbs,donpark/hbs,AlexanderMazaletskiy/hbs