What is the nature of the discussion between Antipholus of Syracuse and the First Merchant at the beginning of Act 1, Scene 2?

At the beginning of Act 1, Scene 2 Antipholus of Syracuse and the First Merchant discuss the strict laws that have been enacted against foreigners and that a Syracusan merchant is going to be executed that day; Antipholus should pretend he is from Epidamnum to protect himself.