private String pad(String value) {
		StringBuffer sb = new StringBuffer();
		int len = symbolSize - value.length();

		for (int i = 0; i < len; i++) {
			sb.append("0");
		}
		sb.append(value);
		return (sb.toString());
	}
@see ghidra.app.plugin.core.format.DataFormatModel#validateBytesPerLine(int)
Ghidra/Features/ByteViewer/src/main/java/ghidra/app/plugin/core/format/OctalFormatModel.java