(Statements
  (Class
    (Identifier)
    (Statements
      (Method
        (Void)
        (Empty)
        (Identifier)
        (Statements
          (ForEach
            (Variable
              (Identifier)
              (Identifier))
            (Call
              (MemberAccess
                (Identifier))
              (Empty))
            (Statements
              (AssertStatement
                (Equal
                  (Identifier)
                  (Null))))))))))