NewHandlerV1 is a helper function that takes a typed handler's interface implementation and makes it compatible with lambda.Handler.

NewHandlerV2 is a helper function that takes a typed handler's interface implementation and makes it compatible with lambda.Handler.

LambdaHTTPV1 is a typed interface to implement when the Lambda handles HTTP requests from V1 of API Gateway.

LambdaHTTPV2 is a typed interface to implement when the Lambda handles HTTP requests from V2 of API Gateway.