public Optional<String> getRequestTemplate(String mimeType) {
        return Optional.ofNullable(requestTemplates.get(mimeType));
    }
Gets a specific request template by MIME type.

@param mimeType MIME type to get.
@return Returns the optionally found template.
smithy-aws-apigateway-traits/src/main/java/software/amazon/smithy/aws/apigateway/traits/MockIntegrationTrait.java