service Hello:
  say_hello()

func foo():
  on HOST_PEER_ID:
    Hello "hello"

    -- This closure will execute on HOST_PEER_ID
    closure = ():
      Hello.say_hello()

    fn = func ():
      Hello.say_hello()

  -- Will go to HOST_PEER_ID, where Hello service is resolved, and call say_hello
  closure()

  -- Will be called on current peer, probably INIT_PEER_ID, and may fail
  -- in case Hello service is not defined or has another ID
  fn()