this.surroundingOpcodes = "";
	public SourceLineAnnotation(String className, String sourceFile, int startLine, int endLine,	                            int startBytecode, int endBytecode) {		if (className == null) throw new IllegalArgumentException("class name is null");		if (sourceFile == null) throw new IllegalArgumentException("source file is null");		this.description = DEFAULT_ROLE;		this.className = className;		this.sourceFile = sourceFile;		this.startLine = startLine;		this.endLine = endLine;		this.startBytecode = startBytecode;		this.endBytecode = endBytecode;		this.surroundingOpcodes = "";	}