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