private void validateIndex(int index) {
			if (index < 0 || index > 7) {
				throw new LowlevelError("Invalid index: " + Integer.toString(index));
			}
			return;
		}
Returns true precisely when the entire word is initialized.
@return true if entire work initialized
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/memstate/UniqueMemoryBank.java