This document describes non-standard additions to the Official OpenTTD AI and GS Specifications which are present in this patchpack.
These additions MAY also be present in other patchpacks. They MAY be removed or moved in future, if necessary.
Scripts which use any of these features SHOULD check whether the feature is present and if not, fallback to not using it and/or emitting a clear and end-user friendly error message.
Testing for the presence of methods may be done using the "in" operator.