'Look in resolver-specific settings for option and then fallback to global settings.'

def get_resolver_option(self, resolver, key, explicit_resolver_options={}):

    default = resolver.config_options.get(key)
    config_prefix = resolver.resolver_type
    global_key = ('%s_%s' % (config_prefix, key))
    value = explicit_resolver_options.get(key, CONFIG_VAL_NOT_FOUND)
    if (value is CONFIG_VAL_NOT_FOUND):
        value = self.get_app_option(global_key, default)
    return value
