function buildGetSingleResponse(aMatches, oResponse) {
		// EMPLOYEES('B')?$select=AGE,DescendantCount,DistanceFromRoot,DrillState,ID,MANAGER_ID,Name
		const aSelect = getQueryOptions(aMatches[2]).$select.split(",");
		const select = (oNode) => { //TODO share w/ selectCountSkipTop?
			const oResult = {};
			for (const sSelect of aSelect) {
				oResult[sSelect] = oNode[sSelect];
			}
			return oResult;
		};
		const oNode = select(mNodeById[aMatches[1]]);
		// RAP would not respond w/ DescendantCount,DistanceFromRoot,DrillState!
		delete oNode.DescendantCount;
		delete oNode.DistanceFromRoot;
		delete oNode.DrillState;
		// Note: bSkipCopy due to select
		oResponse.message = JSON.stringify(update([oNode], true)[0]);
	}
Builds a response for any GET request on a specific "EMPLOYEE" instance.

@param {string[]} aMatches - The matches against the RegExp
@param {object} oResponse - Response object to fill