(Statements
{+(Function
  {+(Identifier)+}
  {+(RequiredParameter
    {+(Identifier)+})+}
  {+(RequiredParameter
    {+(Identifier)+})+}
  {+(Statements
    {+(Identifier)+})+})+}
  (Function
    (Identifier)
    (Statements
    { (Identifier)
    ->(Identifier) }))
  (Function
  { (Identifier)
  ->(Identifier) }
    (RequiredParameter
    { (Identifier)
    ->(Identifier) })
  {-(RequiredParameter
    {-(Identifier)-})-}
    (Statements
    { (Identifier)
    ->(Identifier) }))
{-(Function
  {-(Identifier)-}
  {-(RequiredParameter
    {-(Identifier)-})-}
  {-(Statements
    {-(Identifier)-})-})-})