src/sap.ui.core/src/sap/ui/model/odata/v4/lib/_Cache.js
function addFilter(oFilterElement) {
			var sFilter = _Helper.getKeyFilter(oFilterElement, that.sMetaPath, mTypeForMetaPath);

			aFilters.push(sFilter);
			return sFilter;
		}
function addFilter(oFilterElement) {
			var sFilter = _Helper.getKeyFilter(oFilterElement, that.sMetaPath, mTypeForMetaPath);

			aFilters.push(sFilter);
			return sFilter;
		}
function addFilter ( oFilterElement ) { var sFilter = _Helper . getKeyFilter ( oFilterElement , that . sMetaPath , mTypeForMetaPath ) ; aFilters . push ( sFilter ) ; return sFilter ; }
Adds the filter for the given element to the array of filters.

@param {object} oFilterElement The element for which a filter is computed
@returns {string} The filter for the given element; <code>undefined</code> if a key
property for the element is missing.
Adds the filter for the given element to the array of filters .