The block definition that this property will be attached to.
Optionalhardness: numberThe hardness of the block type.
Protected ReadonlycollectionThe properties collection of the block type.
ReadonlyidentifierThe component identifier of the block type.
Protected ReadonlytypeThe block type of the component.
Static ReadonlyidentifierThe component identifier of the block type.
Create a new hardness property for a block definition.