package Ġio . github . ric ard or lg . device farm . tractor . controller . services . definitions Ċ Ċ interface ĠI Device Farm Tr actor Logging Ġ{ ĊĠĠĠ Ġfun ĠlogMessage ( msg : ĠString ) ĊĠĠĠ Ġfun Ġlog Error ( error : ĠThrowable ? Ġ= Ġnull , Ġmsg : ĠString ) Ċ } Ċ