================================================================================
errors/undefinedOp3
================================================================================

l = List(1,2,3)
res1 = l["idx"]

--------------------------------------------------------------------------------

(module
  (classProperty
    (identifier)
    (methodCallExpr
      (identifier)
      (argumentList
        (intLiteral)
        (intLiteral)
        (intLiteral))))
  (classProperty
    (identifier)
    (subscriptExpr
      (variableExpr
        (identifier))
      (slStringLiteral))))
