class InsertSerialIDListener(JavaBaseListener):

    def __init__(self, tokens):
        self.rewriter = TokenStreamRewriter(tokens)

    def enterClassBody(self, ctx):
        field = "\n\tpublic static final long serialVersionUID = 1L;"
        self.rewriter.insertAfter(ctx.start, field)
 def __init__(self, tokens):
     self.rewriter = TokenStreamRewriter(tokens)