The PlayerBreakSpeed Event is fired whenever a player tries to break a block.
It can be canceled to stop theplayer from being able to break that block.

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

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

• IEventCancelable
• IPlayerEvent
• IEventPositionable

ZenGetter	ZenSetter	Type
ZenGetter blockState	ZenSetter ​	Type IBlockState
ZenGetter block	ZenSetter ​	Type IBlock
ZenGetter originalSpeed	ZenSetter ​	Type float
ZenGetter newSpeed	ZenSetter newSpeed	Type float