MinecartInteractEvent is fired whenever a player begins to interact with a minecart. The event is cancelable, and doing so will prevent the container from being opened.

You will need to cast the event in the function header as this class:
crafttweaker.event.MinecartInteractEvent
You can, of course, also import the class before and use that name then.

MinecartInteract Events implement the following interfaces and are able to call all of their methods/getters/setters as well:

• IMinecartEvent
• IEventCancelable

ZenGetter	Type
ZenGetter player	Type IPlayer
ZenGetter item	Type IItemStack
ZenGetter hand	Type String