function _handleSuccess(oData) {
			that.oFinalLengths[sNodeId] = true;
			that.oLengths[sNodeId] = parseInt(oData);
		}
Issues a $count request for the given node-id/odata-key.
Only used when running in <code>CountMode.Request</code>. Inlinecounts are appended directly
when issuing a loading request.

@param {string} sNodeId The node's ID

@private