'create tree node that holds the start and stop tokens associated
with an error.
If you specify your own kind of tree nodes, you will likely have to
override this method. CommonTree returns Token.INVALID_TOKEN_TYPE
if no token payload but you might have to set token type for diff
node type.'

def errorNode(self, input, start, stop, exc):

    return CommonErrorNode(input, start, stop, exc)
