public static DefaultCsmConfigurationProviderChain getInstance() {
        return INSTANCE;
    }
The default chain of {@link CsmConfigurationProvider}s.
<p />
This chain attempts to load the client side monitoring configuration by
delegating to the following providers in order, and returning the first
result:
<ul>
    <li>{@link EnvironmentVariableCsmConfigurationProvider}</li>
    <li>{@link SystemPropertyCsmConfigurationProvider}</li>
    <li>{@link ProfileCsmConfigurationProvider}, using {@link
    AwsProfileFileLocationProvider#DEFAULT_CONFIG_LOCATION_PROVIDER} to
    locate the configuration file</li>
</ul>
aws-java-sdk-core/src/main/java/com/amazonaws/monitoring/DefaultCsmConfigurationProviderChain.java