(Program
  (Call
    (MemberAccess
      (This)
    { (Identifier)
    ->(Identifier) })
    (Function
      (Empty)
      (Empty)
      (Empty)
      (RequiredParameter
        (Empty)
        (Empty)
        (Empty)
        (Assignment
          (Identifier)
          (Empty)))
      (
        (Return
        { (Identifier)
        ->(Identifier) })))
    (Empty)))