When the new version is released, deepbots will provide a default implementation for resetting a world, so there would be no need for the end user to implement a reset method, at least a basic one. Of course it will always be possible to override the reset method to add functionality for the use-case.
Webots 2020a rev2 will fix some issues related to resetting the Webots world without resetting the controllers (https://cyberbotics.com/doc/reference/supervisor#wb_supervisor_simulation_reset).
When the new version is released, deepbots will provide a default implementation for resetting a world, so there would be no need for the end user to implement a reset method, at least a basic one. Of course it will always be possible to override the reset method to add functionality for the use-case.
Related https://github.com/aidudezzz/deepworlds/issues/8