public Builder copyBuilder() {
        Builder b = new Builder();
        b.httpRequestTimeout = httpRequestTimeout;
        b.totalExecutionTimeout = totalExecutionTimeout;
        b.customHeaders = new HashMap<>(customHeaders);
        b.customQueryParams = new HashMap<>(customQueryParams);
        return b;
    }
@return A {@link Builder} instance that is initialized with the values of this config.
aws-java-sdk-opensdk/src/main/java/com/amazonaws/opensdk/SdkRequestConfig.java