Issue Description:
The PortableVehicles plugin fails to compile on Carbon since the recent update. The error log is as follows:
07/04 20:43:29 | Failed compiling 'PortableVehicles.cs':
07/04 20:43:29 | 1. 'IFuelSystem' does not contain a definition for 'fuelStorageInstance' and no accessible extension method 'fuelStorageInstance' accepting a first argument of type 'IFuelSystem' could be found (are you missing a using directive or an assembly reference?) [CS1061]
(PortableVehicles 35 line 211)
Steps to Reproduce:
Attempt to compile the PortableVehicles plugin on Carbon.
Observe the compilation failure and the error message.
Additional Information:
The error appears to be related to the 'IFuelSystem' interface, which lacks the 'fuelStorageInstance' definition. This may be due to missing using directives or assembly references.
Please investigate and provide a fix or update for the plugin compatibility with the latest version of Carbon.
Thank you.