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No new method will be added or updated to the AdminCient class. 

AbstractConfig Class

As part of this KIP, we will be adding an new method to the  AbstractConfig to return the documentation for given Config

public String documentationOf(String key) {
        ConfigDef.ConfigKey configKey = definition.configKeys().get(key);
        if (configKey == null)
            return null;
        return configKey.documentation;
    }

Proposed Changes

Under the proposed change, response for AdminClient.describeConfigs would include following new properties, which would be part of DescribeConfigsResponse.ConfigEntry class.

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