Have just bought some filo pastry to make spring rolls with, as per a recipe. But I've just read about spring roll wrappers - what are they, are they just filo pastry anyway, cut into the right shape, or is it something else? I wanted the authentic (well, authentic from a takeaway, that is!) taste - I have eaten spring rolls loads of times but for the life of me I can't think if they're made of filo pastry or something else!