Finds the list of resources from the keyword parameters and pops
        them out of the params dictionary.

def _get_resources(self, args, params):
        """
        Finds the list of resources from the keyword parameters and pops
        them out of the params dictionary.
        """
        resources = []
        disabled = []
        for resource in ['holoviews'] + list(Store.renderers.keys()):
            if resource in args:
                resources.append(resource)

            if resource in params:
                setting = params.pop(resource)
                if setting is True and resource != 'matplotlib':
                    if resource not in resources:
                        resources.append(resource)
                if setting is False:
                    disabled.append(resource)

        unmatched_args = set(args) - set(resources)
        if unmatched_args:
            display(HTML('<b>Warning:</b> Unrecognized resources %s'
                         % ', '.join(unmatched_args)))

        resources = [r for r in resources if r not in disabled]
        if ('holoviews' not in disabled) and ('holoviews' not in resources):
            resources = ['holoviews'] + resources
        return resources