@Override
	public int getByteOffset(ByteBlock block, int position) {
		return 0;
	}
Given a character position from 0 to data unit symbol size - 1
it returns a number from 0 to unit byte size - 1 indicating which
byte the character position was obtained from.
Ghidra/Features/ByteViewer/src/main/java/ghidra/app/plugin/core/format/AsciiFormatModel.java