Uses of Interface
Specific BlockData classes relevant to only a given block or set of blocks.
Uses of Openable in org.bukkit.block.data.typeModifier and TypeInterfaceDescription
interface'hinge' indicates which hinge this door is attached to and will rotate around when opened.
interface'in_wall" indicates if the fence gate is attached to a wall, and if true the texture is lowered by a small amount to blend in better.