Converts a config, of any version, to the current version.
This is done in-place, so the input config will be modified and returned.
Outputs a console error if the after-conversion config is invalid;
this should not happen in practice but if it does, there will likely be other errors downstream.
Converts a config, of any version, to the current version. This is done in-place, so the input config will be modified and returned. Outputs a console error if the after-conversion config is invalid; this should not happen in practice but if it does, there will likely be other errors downstream.