src/sap.ui.core/src/sap/ui/model/odata/v2/ODataTreeBinding.js
function (sKey) {
			var aFiltered = FilterProcessor.apply([sKey], oCombinedFilter, function(vRef, sPath) {
				var oContext = that.oModel.getContext('/' + vRef);
				return that.oModel.getProperty(sPath, oContext);
			});
			return aFiltered.length > 0;
		}
function (sKey) {
			var aFiltered = FilterProcessor.apply([sKey], oCombinedFilter, function(vRef, sPath) {
				var oContext = that.oModel.getContext('/' + vRef);
				return that.oModel.getProperty(sPath, oContext);
			});
			return aFiltered.length > 0;
		}
function ( sKey ) { var aFiltered = FilterProcessor . apply ( [ sKey ] , oCombinedFilter , function ( vRef , sPath ) { var oContext = that . oModel . getContext ( '/' + vRef ) ; return that . oModel . getProperty ( sPath , oContext ) ; } ) ; return aFiltered . length > 0 ; }
filter function for recursive filtering, checks if a single key matches the filters
filter function for recursive filtering checks if a single key matches the filters