`toString` becomes `toString$1` `contains` becomes `contains$1` <img width="453" alt="screen shot 2017-10-11 at 11 21 37 pm" src="https://user-images.githubusercontent.com/9584123/31450040-0b11e71e-ae6e-11e7-94fd-0ddce52528a0.png">
toStringbecomestoString$1containsbecomescontains$1