10There is a coding style in which the function Point::x would have been called something like Point::GetX, Point::getX or Point::get_x; hence the name getters. Almost all of the code that you will see in the Workbook omits the get in the names of accessors; the authors of this code view the get as redundant. Within the Workbook, the exception is for accessors defined by ROOT. The Geant4 package also includes the Get in the names of its accessors.