private ByteField getByteField(String value, BigInteger index) {
		return new ByteField(value, fm, startX, width, false, fieldOffset, index, highlightFactory);
	}
Get the padded string that has the given char value.
Ghidra/Features/ByteViewer/src/main/java/ghidra/app/plugin/core/byteviewer/FieldFactory.java