A sign.
Gets the line of text on this sign at the given index.
Sets the line of text on this sign at the given index to the given line.
The block that this entity is bound to.
The colour that this sign is dyed.
Whether this sign is editable.
Whether this sign has text that is glowing.
The lines of text on this sign.
The position of this block entity.
The type of this block entity.
The world this block entity is in.