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// In CPS core
Stream<DataNode> queryDataNodesAsStream(String dataspaceName, String anchorName, String cpsPath, FetchDescendantsOption fetchDescendantsOption) {
    final var anchor = 	return fragmentRepository.streamByAnchorAndCpsPath(getAnchor(dataspaceName, anchorName);
	return fragmentRepository.streamByAnchorAndCpsPath(anchor, cpsPath)
			.map(fragment -> fetchDescendants(fragment, fetchDescendantsOption))
			.map(fragment -> toDataNode(fragment));
}

// In NCMP
private YangModelCmHandle getAnyReadyCmHandleByModuleSetTag(final String moduleSetTag) {
    return cmHandleQueries.queryNcmpRegistryByCpsPath("/dmi-registry/cm-handles[@module-set-tag='" + moduleSetTag + "']", DIRECT_CHILDREN_ONLY)
			.map(YangDataConverter::convertCmHandleToYangModel)
            .filter(cmHandle -> cmHandle.getCompositeState().getCmHandleState() == CmHandleState.READY)
            .findFirst()
            .orElse(null);
}