private Map<String, Object> configProviderProperties(String configProviderPrefix, Map<String, ?> providerConfigProperties) {
        Map<String, Object> result = new HashMap<>();
        for (Map.Entry<String, ?> entry : providerConfigProperties.entrySet()) {
            String key = entry.getKey();
            if (key.startsWith(configProviderPrefix) && key.length() > configProviderPrefix.length()) {
                result.put(key.substring(configProviderPrefix.length()), entry.getValue());
            }
        }
        return result;
    }
Instantiates given list of config providers and fetches the actual values of config variables from the config providers.
returns a map of config key and resolved values.

@param configProviderProps The map of config provider configs
@param originals           The map of raw configs.
@return map of resolved config variable.
clients/src/main/java/org/apache/kafka/common/config/AbstractConfig.java