public Builder payloadFormatVersion(String payloadFormatVersion) {
            this.payloadFormatVersion = payloadFormatVersion;
            return this;
        }
Sets the payload format version. Required for HTTP APIs.

@param payloadFormatVersion Payload format version to set.
@return Returns the builder.
smithy-aws-apigateway-traits/src/main/java/software/amazon/smithy/aws/apigateway/traits/IntegrationTrait.java