class Aws::Plugins::RegionalEndpoint

def resolve_endpoint(cfg)

Endpoints2.0 that a custom endpoint has NOT been configured by the user.
When the `regional_endpoint` config is set to true - this indicates to
parameter.
Additional behavior controls the setting of the custom SDK::Endpoint
we must preserve that behavior.
but because new old service gems may depend on new core versions
NOTE: with Endpoints 2.0, some of this logic is deprecated 
def resolve_endpoint(cfg)
  endpoint = resolve_custom_config_endpoint(cfg)
  endpoint_prefix = cfg.api.metadata['endpointPrefix']
  return endpoint unless endpoint.nil? && cfg.region && endpoint_prefix
  validate_region!(cfg.region)
  handle_legacy_pseudo_regions(cfg)
  # set regional_endpoint flag - this indicates to Endpoints 2.0
  # that a custom endpoint has NOT been configured by the user
  cfg.override_config(:regional_endpoint, true)
  # a default endpoint is resolved in after_initialize
  nil
end