The following example `serverless.yml` fails to deploy on localstack:

```yaml
service: "localtest"

provider:
  name: "aws"
  runtime: "nodejs10.x"

functions:
  hello:
    handler: "handler.hello"
    
resources:
  Resources:
    ApiGatewayRestApi:
      Type: "AWS::ApiGateway::RestApi"
      Properties:
        Name: "${self:provider.stage}-${self:service}"
    GatewayResponseDefault400:
      Type: "AWS::ApiGateway::GatewayResponse"
      Properties:
        RestApiId:
          Ref: "ApiGatewayRestApi"
        ResponseType: "DEFAULT_4XX"
        ResponseTemplates:
          application/json: '{"errors":[{"message":"Custom text."}]}'
    GatewayResponseUnauthorized:
      Type: "AWS::ApiGateway::GatewayResponse"
      Properties:
        RestApiId:
          Ref: "ApiGatewayRestApi"
        ResponseType: "UNAUTHORIZED"
        ResponseTemplates:
          application/json: '{"errors":[{"message":"Custom text!", "extra":"Some extra info"}]}'
    GatewayResponseDefault500:
      Type: "AWS::ApiGateway::GatewayResponse"
      Properties:
        RestApiId:
          Ref: "ApiGatewayRestApi"
        ResponseType: "DEFAULT_5XX"
        ResponseTemplates:
          application/json: '{"errors":[{"message":$context.error.messageString}]}'
    GatewayResponseIntegrationTimeout:
      Type: "AWS::ApiGateway::GatewayResponse"
      Properties:
        RestApiId:
          Ref: "ApiGatewayRestApi"
        ResponseType: "INTEGRATION_TIMEOUT"
        ResponseTemplates:
          application/json: '{"errors":[{"message":$context.error.messageString}]}'

plugins:
- "serverless-localstack"

custom:
  localstack:
    stages:
      - "local"
```

The error on the localstack end is `Exception: CloudFormation deployment for resource type ApiGateway::GatewayResponse not yet implemented`.
if hasattr(entity, 'physical_resource_id'):
        return entity.physical_resource_id
    
    types_with_ref_as_id_or_name = (apigw_models.RestAPI, apigw_models.Resource)
    attr_candidates = ['function_arn', 'Arn', 'Ref', 'id', 'Id', 'name', 'Name']
    for attr in attr_candidates:
        if hasattr(entity, attr):
            if attr in ['id', 'name'] and not isinstance(entity, types_with_ref_as_id_or_name):
                LOG.warning('Unable to find ARN, using "%s" instead: %s - %s',
                            attr, resource_json, entity)
            return getattr(entity, attr)
        if hasattr(entity, 'get_cfn_attribute'):
            try:
                result = entity.get_cfn_attribute(attr)
                if result:
                    return result
            except Exception:
                pass
    
    if hasattr(entity, 'params'):
        for key, value in (entity.params or {}).items():
            if key.endswith('Name'):
                return value
def convert_objs_to_ids(resource_json):