index.js
function (successFn, errorFn) {
    successFn = successFn || emptyFn;
    errorFn = errorFn || emptyFn;
    RNBackgroundGeolocation.getStationaryLocation(successFn, errorFn);
  }
function (successFn, errorFn) {
    successFn = successFn || emptyFn;
    errorFn = errorFn || emptyFn;
    RNBackgroundGeolocation.getStationaryLocation(successFn, errorFn);
  }
function ( successFn , errorFn ) { successFn = successFn || emptyFn ; errorFn = errorFn || emptyFn ; RNBackgroundGeolocation . getStationaryLocation ( successFn , errorFn ) ; }
Returns current stationaryLocation if available.  null if not
Returns current stationaryLocation if available . null if not