Scala: pass Seq to var-args functions

Given a function that takes a variable number of arguments, e.g.

def foo(os: String*) =
  println(os.toList)

How can I pass a sequence of arguments to the function? I开发者_StackOverflow would like to write:

val args = Seq("hi", "there")
foo(args)

Obviously, this does not work.

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foo(args:_*) does the trick. Instead of applying the sequence as one single argument, each element in the sequence will be used as an argument.