@Override
	public void markup(Program program, MachHeader header, String source, TaskMonitor monitor,
			MessageLog log) throws CancelledException {
		Address addr = fileOffsetToAddress(program, header, dataoff, datasize);
		if (addr == null) {
			return;
		}
		super.markup(program, header, source, monitor, log);

		try {
			Data d = DataUtilities.createData(program, addr, blob.toDataType(), -1,
				DataUtilities.ClearDataMode.CHECK_FOR_SPACE);
			StructConverter.setEndian(d, true);
			blob.markup(program, addr, header, monitor, log);
		}
		catch (Exception e) {
			log.appendMsg(CodeSignatureCommand.class.getSimpleName(),
				"Failed to markup: " + getContextualName(source, null));
		}
	}
Creates and parses a new {@link CodeSignatureCommand}

@param loadCommandReader A {@link BinaryReader reader} that points to the start of the load
  command
@param dataReader A {@link BinaryReader reader} that can read the data that the load command
  references.  Note that this might be in a different underlying provider.
@throws IOException if an IO-related error occurs while parsing
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/macho/commands/CodeSignatureCommand.java