def _processArgs(self, entry, *_args, **_kwargs):
        """ Given an entry, positional and keyword arguments, figure out what
        the query-string options, payload and api arguments are.
        """

        # We need the args to be a list so we can mutate them
        args = list(_args)
        kwargs = copy.deepcopy(_kwargs)

        reqArgs = entry['args']
        routeParams = {}

        query = {}
        payload = None
        kwApiArgs = {}

        paginationHandler = None
        paginationLimit = None

        # There are three formats for calling methods:
        #   1. method(v1, v1, payload)
        #   2. method(payload, k1=v1, k2=v2)
        #   3. method(payload=payload, query=query, params={k1: v1, k2: v2})
        if len(kwargs) == 0:
            if 'input' in entry and len(args) == len(reqArgs) + 1:
                payload = args.pop()
            if len(args) != len(reqArgs):
                log.debug(args)
                log.debug(reqArgs)
                raise exceptions.TaskclusterFailure('Incorrect number of positional arguments')
            log.debug('Using method(v1, v2, payload) calling convention')
        else:
            # We're considering kwargs which are the api route parameters to be
            # called 'flat' because they're top level keys.  We're special
            # casing calls which have only api-arg kwargs and possibly a payload
            # value and handling them directly.
            isFlatKwargs = True
            if len(kwargs) == len(reqArgs):
                for arg in reqArgs:
                    if not kwargs.get(arg, False):
                        isFlatKwargs = False
                        break
                if 'input' in entry and len(args) != 1:
                    isFlatKwargs = False
                if 'input' not in entry and len(args) != 0:
                    isFlatKwargs = False
                else:
                    pass  # We're using payload=, query= and param=
            else:
                isFlatKwargs = False

            # Now we're going to handle the two types of kwargs.  The first is
            # 'flat' ones, which are where the api params
            if isFlatKwargs:
                if 'input' in entry:
                    payload = args.pop()
                kwApiArgs = kwargs
                log.debug('Using method(payload, k1=v1, k2=v2) calling convention')
                warnings.warn(
                    "The method(payload, k1=v1, k2=v2) calling convention will soon be deprecated",
                    PendingDeprecationWarning
                )
            else:
                kwApiArgs = kwargs.get('params', {})
                payload = kwargs.get('payload', None)
                query = kwargs.get('query', {})
                paginationHandler = kwargs.get('paginationHandler', None)
                paginationLimit = kwargs.get('paginationLimit', None)
                log.debug('Using method(payload=payload, query=query, params={k1: v1, k2: v2}) calling convention')

        if 'input' in entry and isinstance(payload, type(None)):
            raise exceptions.TaskclusterFailure('Payload is required')

        # These all need to be rendered down to a string, let's just check that
        # they are up front and fail fast
        for arg in args:
            if not isinstance(arg, six.string_types) and not isinstance(arg, int):
                raise exceptions.TaskclusterFailure(
                    'Positional arg "%s" to %s is not a string or int' % (arg, entry['name']))

        for name, arg in six.iteritems(kwApiArgs):
            if not isinstance(arg, six.string_types) and not isinstance(arg, int):
                raise exceptions.TaskclusterFailure(
                    'KW arg "%s: %s" to %s is not a string or int' % (name, arg, entry['name']))

        if len(args) > 0 and len(kwApiArgs) > 0:
            raise exceptions.TaskclusterFailure('Specify either positional or key word arguments')

        # We know for sure that if we don't give enough arguments that the call
        # should fail.  We don't yet know if we should fail because of two many
        # arguments because we might be overwriting positional ones with kw ones
        if len(reqArgs) > len(args) + len(kwApiArgs):
            raise exceptions.TaskclusterFailure(
                '%s takes %d args, only %d were given' % (
                    entry['name'], len(reqArgs), len(args) + len(kwApiArgs)))

        # We also need to error out when we have more positional args than required
        # because we'll need to go through the lists of provided and required args
        # at the same time.  Not disqualifying early means we'll get IndexErrors if
        # there are more positional arguments than required
        if len(args) > len(reqArgs):
            raise exceptions.TaskclusterFailure('%s called with too many positional args',
                                                entry['name'])

        i = 0
        for arg in args:
            log.debug('Found a positional argument: %s', arg)
            routeParams[reqArgs[i]] = arg
            i += 1

        log.debug('After processing positional arguments, we have: %s', routeParams)

        routeParams.update(kwApiArgs)

        log.debug('After keyword arguments, we have: %s', routeParams)

        if len(reqArgs) != len(routeParams):
            errMsg = '%s takes %s args, %s given' % (
                entry['name'],
                ','.join(reqArgs),
                routeParams.keys())
            log.error(errMsg)
            raise exceptions.TaskclusterFailure(errMsg)

        for reqArg in reqArgs:
            if reqArg not in routeParams:
                errMsg = '%s requires a "%s" argument which was not provided' % (
                    entry['name'], reqArg)
                log.error(errMsg)
                raise exceptions.TaskclusterFailure(errMsg)

        return routeParams, payload, query, paginationHandler, paginationLimit
Given an entry, positional and keyword arguments, figure out what
        the query-string options, payload and api arguments are.