package Ġno . sand ram o en . span kf ury . utils Ċ Ċ interface ĠGoogle Play Services Ġ{ ĊĠĠĠ Ġfun Ġsign In () ĊĠĠĠ Ġfun Ġsign Out () ĊĠĠĠ Ġfun Ġis Signed In (): ĠBoolean ĊĠĠĠ Ġfun Ġget Leader board () ĊĠĠĠ Ġfun Ġfetch High Score () ĊĠĠĠ Ġfun Ġget High Score (): ĠInt ĊĠĠĠ Ġfun Ġsubmit Score ( score : ĠInt ) Ċ } Ċ