core/src/main/java/io/fabric8/maven/core/model/Configuration.java
public Optional<Map<String, Object>> getSecretConfiguration(String id) {
        return secretConfigLookup.apply(id);
    }
public Optional<Map<String, Object>> getSecretConfiguration(String id) {
        return secretConfigLookup.apply(id);
    }
Gets configuration values. Since there can be inner values,
it returns a Map of Objects where an Object can be a
simple type, List or another Map.

@param id id specific to the secret store
@return configuration map specific to this id