(Statements
  (InterfaceDeclaration
  { (Identifier)
  ->(Identifier) }
    (Statements
    {+(Statements
      {+(Assignment
        {+(Variable
          {+(Identifier)+}
          {+(Identifier)+})+}
        {+(Integer)+})+})+}))
  (Context
  { (Comment)
  ->(Comment) }
    (Empty)))