aqua/aqua-src/demo.aqua

service OpH("op"):
  puk(s: string) -> string
  pek(s: string, -- trgtr
      c: string) -> string

func a( -- ferkjn
  b: string, -- fr
  c: string, -- asdf
  g: string
  ) -> string: -- rgtr

  try:
    f = "world"
    OpH "planet"
    OpH.pek("TRY THIS", -- gtrg
            c)
  catch err:
    OpH.puk(err.msg)
  <- f
  -- hello