Apply the changes specified in the document https://docs.google.com/a/google.com/document/d/1ZDsQObx71xm4x1loChU9t0fMItttVVlzW76mR_dPu8o/edit#
Produce version of the sample with all the provided methods removed for the codelab https://docs.google.com/a/google.com/document/d/1ZDsQObx71xm4x1loChU9t0fMItttVVlzW76mR_dPu8o/edit#heading=h.tj20nwap6w15