public boolean getReuseLastProvider() {
        return reuseLastProvider;
    }
Returns true if this chain will reuse the last successful credentials
provider for future credentials requests, otherwise, false if it will
search through the chain each time.

@return True if this chain will reuse the last successful credentials
        provider for future credentials requests.
aws-java-sdk-core/src/main/java/com/amazonaws/auth/AWSCredentialsProviderChain.java